GM Safety Package: Forward Collision Alert/Automatic Emergency Braking, Lane Cha
AvailableCalibration required after windshield replacement, camera/radar service, or structural repair affecting sensor alignment.
3,200+ Vehicles Supported
1-Year Unlimited Guarantee
Same-Day Mobile Service
DFW Serving Dallas / Fort Worth
2020-2026 GMC Sierra 2500HD Generation Guide
GMC Sierra 2500HD 4th Gen T1XX (2020-2026) ADAS Calibration & Module Programming
Covers model years 2020-2026 - one service guide for the whole generation.
Full ADAS calibration, module programming, and key security work for every GMC Sierra 2500HD built on this platform. Same-day mobile service across the Dallas/Fort Worth metroplex; mail-in accepted nationwide.
- Platform GMT T1 HD (Heavy Duty)
- CAN Architecture GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps
- Security GM PASS-Key III+ / PKES - BCM-linked; GDS2 + TIS2WEB required; generic programmers incompatible
The ADAS, module, and security rows below are consolidated across the full 2020-2026 generation. A year badge marks rows that apply only to part of the span; rows without a badge apply to every year. Year-specific differences are summarized under “What changes across 2020-2026”.
OVERVIEW
Expert ADAS calibration, module programming, and diagnostic recovery for the 2020 GMC Sierra-2500hd. On this vehicle we cover documented systems include Forward Camera (Monocular), Forward Radar (77GHz), and Blind Spot Monitor Sensor - Left (BSM), this GMT T1 HD (Heavy Duty) platform vehicle, GM PASS-Key III+ (T1 HD) immobilizer support, GMC Infotainment 3 infotainment programming. Mobile across the DFW Metroplex, mail-in nationwide for module-bench work.
Platform
GMT T1 HD (Heavy Duty)
Production
2001-present
Trim Levels
Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements.
Drivetrain
RWD / 4WD
Engine
-
CAN Speed
GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps
Feature availability 3
Immobilizer: GM PASS-Key III+ (T1 HD)
StandardKey programming requires manufacturer-level tool access.
Platform: GMT T1 HD (Heavy Duty)
ConfirmedVerify platform code matches when cross-referencing part numbers across model years.
Tool access for this exact year
Representative tool access paths for this exact model year, gated by the vehicle data and source packet we currently trust.
Factory scan, coding, and calibration access
GM GDS2 / GM Tech2Win / GM MDI 2
Factory routines and secure server authorization control this path when aftermarket coverage is not enough for the VIN.
OEM subscription required
Make-level OEM tool map plus exact-year gateway and ADAS fields.
ADAS scan, setup, and verification
Autel, Launch Tech, Topdon
Used where aftermarket coverage supports the procedure; OEM software remains required for locked factory routines.
Tool subscription required
Service-level scanner-vendor source packet plus exact-year ADAS records.
Bench cloning and chip-level recovery
Alientech / Autotuner / Orange5 / Scanmatik / Flex / VVDI2 / PCMFlash / CGDI / X-Prog
Used only when the module, donor data, EEPROM, MCU, or crash-data workflow requires bench or chip-level handling.
Bench/chip-level only
Bench programmer source packet plus exact-year module/security records.
Know this platform
This platform uses GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps with ISO 15765-4 CAN (500kbps HS-CAN).
- CAN
- GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps
- OBD
- ISO 15765-4 CAN (500kbps HS-CAN)
OPENPILOT / COMMA.AI
Openpilot Compatibility
Not Supported
Not supported - sierra-2500hd not in openpilot support tree
Not in openpilot support tree as of April 2026.
Generation service summary for GMC Sierra 2500HD 4th Gen T1XX (2020-2026)
Generation coverage
This page consolidates GMC Sierra 2500HD service data for 2020-2026 across 7 model years.
Choose a yearADAS coverage
Merged ADAS coverage includes 7 system records, including Forward Camera (Monocular), Forward Radar (77GHz), Blind Spot Monitor Sensor - Left (BSM), and Blind Spot Monitor Sensor - Right (BSM). Year-marked systems apply only to the shown range.
View ADAS dataCalibration triggers
This generation has 11 merged calibration trigger records. Trigger applicability can vary by year - verify by VIN before setup.
View triggersProgrammable modules
Module support is confirmed by VIN and part number when no merged module records are listed.
View modulesGateway and security
Gateway and immobilizer access is checked by VIN before programming or key service.
View securityCore Auto Logic capability
Core Auto Logic supports generation-level diagnostics, ADAS calibration, module programming, security-access planning, and mail-in bench work for the GMC Sierra 2500HD 2020-2026 span, with exact-year validation before service.
Get a quoteDo I need calibration?
Windshield Replacement 5
FEC Camera
required
FEC static calibration required via GDS2 after windshield replacement. Level surface, calibration target at WSM distance. DTC B127E common if calibration skipped. Use OEM-equivalent glass - aftermarket glass with incorrect rake angle causes calibration failure on T1 HD due to high mounting position.
Forward Collision Alert
required
FEC static calibration required via GDS2 after windshield replacement. Level surface, calibration target at WSM distance. DTC B127E common if calibration skipped. Use OEM-equivalent glass - aftermarket glass with incorrect rake angle causes calibration failure on T1 HD due to high mounting position.
AEB
required
FEC static calibration required via GDS2 after windshield replacement. Level surface, calibration target at WSM distance. DTC B127E common if calibration skipped. Use OEM-equivalent glass - aftermarket glass with incorrect rake angle causes calibration failure on T1 HD due to high mounting position.
Lane Keep Assist
required
FEC static calibration required via GDS2 after windshield replacement. Level surface, calibration target at WSM distance. DTC B127E common if calibration skipped. Use OEM-equivalent glass - aftermarket glass with incorrect rake angle causes calibration failure on T1 HD due to high mounting position.
Lane Departure Warning
required
FEC static calibration required via GDS2 after windshield replacement. Level surface, calibration target at WSM distance. DTC B127E common if calibration skipped. Use OEM-equivalent glass - aftermarket glass with incorrect rake angle causes calibration failure on T1 HD due to high mounting position.
Front Bumper Repair or Replacement 2
Front Radar (FCA/AEB)
required
Front radar static aim calibration required via GDS2 after any front bumper work. Inspect radar mounting bracket for deformation. Aftermarket winch plates and bull bars require standoff distance verification - radar aim tolerance is strict. Park assist sensors verify after bumper cover R&R.
Front Park Assist Sensors
required
Front radar static aim calibration required via GDS2 after any front bumper work. Inspect radar mounting bracket for deformation. Aftermarket winch plates and bull bars require standoff distance verification - radar aim tolerance is strict. Park assist sensors verify after bumper cover R&R.
Rear Bumper Repair or Replacement 3
SBZA Rear Sensors
required
SBZA rear corner sensors require GDS2 initialization if removed or replaced. Drive-off self-calibration after PMI. Hitch camera re-registration if tailgate disturbed. Trailer hitch installation that physically relocates sensors triggers DTC B176C.
Rear Cross Traffic Alert
required
SBZA rear corner sensors require GDS2 initialization if removed or replaced. Drive-off self-calibration after PMI. Hitch camera re-registration if tailgate disturbed. Trailer hitch installation that physically relocates sensors triggers DTC B176C.
Hitch Guidance Camera
required
SBZA rear corner sensors require GDS2 initialization if removed or replaced. Drive-off self-calibration after PMI. Hitch camera re-registration if tailgate disturbed. Trailer hitch installation that physically relocates sensors triggers DTC B176C.
DPF / DEF System Service (Diesel L5P) 5
ECM
required
DIESEL SPECIFIC: After DPF cleaning or replacement, DEF module service, or NOx sensor replacement - ECM DPF adaptation reset required via GDS2 special functions. NOx sensor upstream and downstream relearn. EGR valve position relearn. Failure to reset adaptation data causes premature forced DPF regeneration cycles and MIL illumination.
DPF
required
DIESEL SPECIFIC: After DPF cleaning or replacement, DEF module service, or NOx sensor replacement - ECM DPF adaptation reset required via GDS2 special functions. NOx sensor upstream and downstream relearn. EGR valve position relearn. Failure to reset adaptation data causes premature forced DPF regeneration cycles and MIL illumination.
DEF
required
DIESEL SPECIFIC: After DPF cleaning or replacement, DEF module service, or NOx sensor replacement - ECM DPF adaptation reset required via GDS2 special functions. NOx sensor upstream and downstream relearn. EGR valve position relearn. Failure to reset adaptation data causes premature forced DPF regeneration cycles and MIL illumination.
EGR
required
DIESEL SPECIFIC: After DPF cleaning or replacement, DEF module service, or NOx sensor replacement - ECM DPF adaptation reset required via GDS2 special functions. NOx sensor upstream and downstream relearn. EGR valve position relearn. Failure to reset adaptation data causes premature forced DPF regeneration cycles and MIL illumination.
NOx Sensors
required
DIESEL SPECIFIC: After DPF cleaning or replacement, DEF module service, or NOx sensor replacement - ECM DPF adaptation reset required via GDS2 special functions. NOx sensor upstream and downstream relearn. EGR valve position relearn. Failure to reset adaptation data causes premature forced DPF regeneration cycles and MIL illumination.
Any Collision 5
SDM
required
Full scan mandatory. SDM replace-only after hard deployment - no crash clear on T1 HD. Verify all impact sensors. Calibrate all disturbed ADAS systems before delivery. ProGrade Trailering system scan if rear damage occurred.
all deployed airbags and sensors
required
Full scan mandatory. SDM replace-only after hard deployment - no crash clear on T1 HD. Verify all impact sensors. Calibrate all disturbed ADAS systems before delivery. ProGrade Trailering system scan if rear damage occurred.
FEC Camera
required
Full scan mandatory. SDM replace-only after hard deployment - no crash clear on T1 HD. Verify all impact sensors. Calibrate all disturbed ADAS systems before delivery. ProGrade Trailering system scan if rear damage occurred.
Front Radar
required
Full scan mandatory. SDM replace-only after hard deployment - no crash clear on T1 HD. Verify all impact sensors. Calibrate all disturbed ADAS systems before delivery. ProGrade Trailering system scan if rear damage occurred.
SBZA Sensors
required
Full scan mandatory. SDM replace-only after hard deployment - no crash clear on T1 HD. Verify all impact sensors. Calibrate all disturbed ADAS systems before delivery. ProGrade Trailering system scan if rear damage occurred.
Lift Kit or Leveling Kit Installation 2
Front Radar (FCA/AEB)
required
Front radar aim and FEC camera calibration required after any suspension height change. Vehicle must be at final ride height before calibration. T1 HD is commonly lifted - this trigger applies to a high percentage of service units.
FEC Camera aim
required
Front radar aim and FEC camera calibration required after any suspension height change. Vehicle must be at final ride height before calibration. T1 HD is commonly lifted - this trigger applies to a high percentage of service units.
Any Module Replacement 10
BCM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
ECM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
TCM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
EBCM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
SDM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
ICS
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
IPC
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
TCCM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
TBC
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
PSCM
required
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
Forward Camera Replacement 1
Yes
Camera module replacement requires full recalibration using GDS2/MDI2.
Forward Radar Replacement 1
Yes
Radar module replacement requires alignment/calibration using GDS2/MDI2.
BSM Sensor Replacement 1
Yes
Blind spot monitoring sensor replacement requires calibration using GDS2/MDI2.
Mirror Replacement 1
Yes
Surround view mirror camera recalibration required after mirror R&R. Use GDS2/MDI2.
Year-by-year details
| Year | VIN split | Infotainment | Wireless CarPlay | Wireless Android Auto | Trim notes |
|---|---|---|---|---|---|
| 2020 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. | ||
| 2021 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. | ||
| 2022 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. | ||
| 2023 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 Premium | 1 | 1 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. |
| 2024 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 Premium | 1 | 1 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. |
| 2025 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 Premium | 1 | 1 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. |
| 2026 | VIN pos 4-8 identifies series/body/engine. GM WMI: 1GK (GMC SUV), 1GT (GMC truck). Position 8 = engine code. Position 10 = model year code. | GMC Infotainment 3 Premium | 1 | 1 | Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements. |
What changes across 2020-2026
Differences versus the generation reference year. Years not listed here match the shared platform data on this page.
2023
- Infotainment: GMC Infotainment 3 Premium (was GMC Infotainment 3)
- Wireless CarPlay: Yes
- Wireless Android Auto: Yes
2024
- Infotainment: GMC Infotainment 3 Premium (was GMC Infotainment 3)
- Wireless CarPlay: Yes
- Wireless Android Auto: Yes
2025
- Infotainment: GMC Infotainment 3 Premium (was GMC Infotainment 3)
- Wireless CarPlay: Yes
- Wireless Android Auto: Yes
2026
- Infotainment: GMC Infotainment 3 Premium (was GMC Infotainment 3)
- Wireless CarPlay: Yes
- Wireless Android Auto: Yes
Filter by year
ADAS CALIBRATION MATRIX
ADAS systems on this vehicle
GM Safety Package: Forward Collision Alert/Automatic Emergency Braking, Lane Change Alert w/Blind Spot Monitoring (Side Blind Zone Alert), Rear Cross-Traffic Alert, HD Rear Camera; ProGrade Trailering System (SLT/Denali/AT4)
Scroll for part numbers and Details
| System | Type | Category | Cal. Type | Supported | Part # | Actions |
|---|---|---|---|---|---|---|
| Forward Camera (Monocular) | Forward Camera | Camera | Static | YES | ~84394 (VERIFY GMDB BY VIN) | |
| Forward Radar (77GHz) | Front Radar | Radar | Static | YES | ~84277 (VERIFY GMDB) | |
| Blind Spot Monitor Sensor - Left (BSM) | Side Radar | Radar | Static + Dynamic | YES | ~23367640 (VERIFY GMDB) | |
| Blind Spot Monitor Sensor - Right (BSM) | Side Radar | Radar | Static + Dynamic | YES | ~23367641 (VERIFY GMDB) | |
| HD Surround Vision Camera System (4-camera, if equipped) | Multi-Camera | Camera | Static | YES | ~84 EACH CAMERA (VERIFY GMDB) | |
| Trailer Brake Controller (TBC) | Trailer Integration | Other | None | YES | ~23360 (VERIFY GMDB) | |
| HD Rear Camera / Hitch Guidance | Rear Camera | Camera | None | YES | ~84495 (VERIFY GMDB) |
ADAS SYSTEM
YES Supported
Identification
- System type
- Module category
- Sensor location
Part Numbers
- OEM
- Alternative
Calibration & Triggers
- Calibration type
- Programming approach
- Requires PMI
- Trigger events
Technical Notes
- Chip / MCU
- Service notes
Need this calibrated?
Get a quote for ADAS calibration WHEN IS CALIBRATION REQUIRED?
Triggers for ADAS recalibration
Windshield Replacement Affected: FEC Camera, Forward Collision Alert, AEB, Lane Keep Assist, Lane Departure Warning
FEC static calibration required via GDS2 after windshield replacement. Level surface, calibration target at WSM distance. DTC B127E common if calibration skipped. Use OEM-equivalent glass - aftermarket glass with incorrect rake angle causes calibration failure on T1 HD due to high mounting position.
Front Bumper Repair or Replacement Affected: Front Radar (FCA/AEB), Front Park Assist Sensors
Front radar static aim calibration required via GDS2 after any front bumper work. Inspect radar mounting bracket for deformation. Aftermarket winch plates and bull bars require standoff distance verification - radar aim tolerance is strict. Park assist sensors verify after bumper cover R&R.
Rear Bumper Repair or Replacement Affected: SBZA Rear Sensors, Rear Cross Traffic Alert, Hitch Guidance Camera
SBZA rear corner sensors require GDS2 initialization if removed or replaced. Drive-off self-calibration after PMI. Hitch camera re-registration if tailgate disturbed. Trailer hitch installation that physically relocates sensors triggers DTC B176C.
DPF / DEF System Service (Diesel L5P) Affected: ECM, DPF, DEF, EGR, NOx Sensors
DIESEL SPECIFIC: After DPF cleaning or replacement, DEF module service, or NOx sensor replacement - ECM DPF adaptation reset required via GDS2 special functions. NOx sensor upstream and downstream relearn. EGR valve position relearn. Failure to reset adaptation data causes premature forced DPF regeneration cycles and MIL illumination.
Any Collision Affected: SDM, all deployed airbags and sensors, FEC Camera, Front Radar, SBZA Sensors
Full scan mandatory. SDM replace-only after hard deployment - no crash clear on T1 HD. Verify all impact sensors. Calibrate all disturbed ADAS systems before delivery. ProGrade Trailering system scan if rear damage occurred.
Lift Kit or Leveling Kit Installation Affected: Front Radar (FCA/AEB), FEC Camera aim
Front radar aim and FEC camera calibration required after any suspension height change. Vehicle must be at final ride height before calibration. T1 HD is commonly lifted - this trigger applies to a high percentage of service units.
Any Module Replacement Affected: BCM, ECM, TCM, EBCM, SDM, ICS, IPC, TCCM, TBC, PSCM
SPS programming via TIS2WEB mandatory for all replaced modules via GDS2. RPO option configuration must be transferred or reconfigured. BCM replacement requires PASS-Key III+ key relearn with all keys present. Diesel ECM additionally requires emissions adaptation reset. Coordinate ECM/TCM relearn after programming.
Forward Camera Replacement
Camera module replacement requires full recalibration using GDS2/MDI2.
Forward Radar Replacement
Radar module replacement requires alignment/calibration using GDS2/MDI2.
BSM Sensor Replacement
Blind spot monitoring sensor replacement requires calibration using GDS2/MDI2.
Mirror Replacement
Surround view mirror camera recalibration required after mirror R&R. Use GDS2/MDI2.
Modules we program on this generation
Documented GMC Sierra 2500HD module coverage for 2020-2026. Open a group for part numbers, programming protocol, security notes, and clone support.
SRS MODULES
SRS Modules
Sensing & Diagnostic Module (SDM) 13524234
- PART
- 13524234
- LOCATION
- Under center console
- MFG
- Continental
- NOTES
- Requires GM GDS2 / Tech2 or J2534 for SRS reset. DTC B0100 common after crash events. Wait 90 seconds after ignition off before disconnecting battery.
Sensing & Diagnostic Module (SDM) 84396838
- PART
- 84396838
- LOCATION
- Under center console
- MFG
- Continental
- NOTES
- Requires GM GDS2 / Tech2 or J2534 for SRS reset. DTC B0100 common after crash events. Wait 90 seconds after ignition off before disconnecting battery.
Sensing & Diagnostic Module (SDM) 84396837
- PART
- 84396837
- LOCATION
- Under center console
- MFG
- Continental
- NOTES
- Requires GM GDS2 / Tech2 or J2534 for SRS reset. DTC B0100 common after crash events. Wait 90 seconds after ignition off before disconnecting battery.
Sensing & Diagnostic Module (SDM) 13514198
- PART
- 13514198
- LOCATION
- Under center console
- MFG
- Continental
- NOTES
- Requires GM GDS2 / Tech2 or J2534 for SRS reset. DTC B0100 common after crash events. Wait 90 seconds after ignition off before disconnecting battery.
ECU MODULES
ECU Modules
ECM - 6.6L L8T V8 Gasoline ~12694 (VERIFY GMDB BY VIN)
- PART
- ~12694 (VERIFY GMDB BY VIN)
- PROTOCOL
- OBD Programming Port
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- Delco E80 / Bosch ECM
- NOTES
- SPS programming via TIS2WEB. VIN tie required. PASS-Key III+ security parameter transfer from old ECM. Idle relearn procedure after replacement. Cam phaser relearn via GDS2. Injector balance rate reset. Battery must be stable (>=12.4V or charger connected) during programming. L8T pairs with Allison 6L90 - verify transmission quick learn after ECM programming.
ECM - 6.6L L5P Duramax Diesel ~12708 (VERIFY GMDB BY VIN)
- PART
- ~12708 (VERIFY GMDB BY VIN)
- PROTOCOL
- OBD Programming Port
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- Delco/Bosch diesel ECM
- NOTES
- DIESEL CRITICAL: SPS programming via TIS2WEB. VIN tie + PASS-Key parameter transfer. After ECM replacement: DPF (Diesel Particulate Filter) adaptation reset required via GDS2 - do not skip or vehicle will initiate forced regeneration cycles. DEF (Diesel Exhaust Fluid) system relearn. Injector return flow calibration per cylinder. EGR valve position relearn. NOx sensor upstream/downstream relearn via GDS2 special functions. Glow plug module communication check. Programming takes longer than gas ECM - allow extended SPS time on TIS2Web. Allison 10-speed L8T0 TCM quick learn required after ECM programming.
TCM - Allison 6L90 (L8T Gas) ~24285 (VERIFY GMDB)
- PART
- ~24285 (VERIFY GMDB)
- PROTOCOL
- OBD Programming Port
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- Delco TCM
- NOTES
- SPS programming via TIS2WEB. GDS2 transmission quick learn after replacement. Adaptive shift data reset. Confirm smooth operation through all 6 gears on road test. L8T gas engine only.
TCM - Allison 10L1000 (L5P Diesel) ~24294 (VERIFY GMDB)
- PART
- ~24294 (VERIFY GMDB)
- PROTOCOL
- OBD Programming Port
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- Allison TCM
- NOTES
- SPS programming via TIS2WEB. GDS2 Allison 10-speed quick learn after replacement. Adaptive shift data reset. L5P diesel only. Verify shift quality through all 10 gears under load. High-torque diesel calibration - do not use gas TCM calibration files.
EBCM (Electronic Brake Control Module) ~84 (VERIFY GMDB)
- PART
- ~84 (VERIFY GMDB)
- PROTOCOL
- OBD Programming Port
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- Continental/Delphi EBCM
- NOTES
- SPS programming via TIS2WEB. GDS2 ABS/StabiliTrak initialization + 4-wheel bleed sequence after replacement. Steering angle sensor zero-point calibration required - GDS2 SAS reset, drive straight at 35+ mph. Heavy-duty brake system - pressure bleed preferred. Towing/trailer brake interaction: verify EBCM + TBC communication DTC-free after replacement.
BCM MODULES
BCM Modules
Body Control Module (BCM) ~84252 (APTIV SECURECONNECT GEN 3 - VERIFY GMDB)
- PART
- ~84252 (APTIV SECURECONNECT GEN 3 - VERIFY GMDB)
- SECURITY
- PASS-Key III+
- CODING
- Yes
- CLONE
- Yes
- NOTES
- SPS programming via TIS2WEB required after replacement. BCM holds PASS-Key III+ / PKES database - all customer keys must be present at time of relearn. Configure all vehicle RPO options: MultiPro tailgate mode, trailer brake controller, heated/ventilated seats, SBZA, Surround Vision, remote start. VIN programming required. Not plug and play.
TCCM (Transfer Case Control Module) ~84 (VERIFY GMDB BY DRIVETRAIN)
- PART
- ~84 (VERIFY GMDB BY DRIVETRAIN)
- SECURITY
- standard_uds
- CODING
- Yes
- CLONE
- Yes
- NOTES
- 4WD variants. SPS PMI required via TIS2WEB. Transfer case learn procedure required after replacement via GDS2 special functions. DTC P0825 if TCCM not programmed. Verify 2WD/4H/4L operation on road test.
Integrated Trailer Brake Control Module ~23360 (VERIFY GMDB)
- PART
- ~23360 (VERIFY GMDB)
- SECURITY
- standard_uds
- CODING
- Yes
- CLONE
- No
- NOTES
- GDS2 TBC initialization and gain calibration. Available LT and above. User-adjustable gain setting via DIC. Connect known-good trailer to verify brake output during calibration road test.
TCU / TCM TRANSMISSION MODULES
TCU / TCM Transmission Modules
TCU - Allison 10L1000 10-Speed Auto 24292130
- PART
- 24292130
- PROTOCOL
- Bench
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- NXP MPC5748G
- NOTES
- New 10-speed Allison. GM GDS2/MDI2 required. TranSynd 668 ATF. TCM relearn via scan tool. VIN coding required.
ABS / BRAKE MODULES
ABS / Brake Modules
Electronic Brake Control Module (EBCM) ~84 (CONTINENTAL
- PART
- ~84 (CONTINENTAL
- CLONE
- Yes
- NOTES
- GDS2 ABS/StabiliTrak initialization + 4-wheel brake bleed after replacement. Pressure bleed preferred on HD application. Steering angle sensor zero-point calibration - GDS2 SAS reset, drive straight at 35+ mph on level surface. StabiliTrak and Tow/Haul mode warnings persist until SAS learning completes. DTC C0035-C0045 common if wheel speed sensor disturbed during EBCM removal on large-bolt hub.
OTHER MODULES (IPC, SAS)
Other Modules (IPC, SAS)
Instrument Panel Cluster (IPC) 84682069
- PART
- 84682069
- CLONE
- Yes
- NOTES
- IPC cloning required for mileage preservation during replacement. Use Launch advanced programming tool or EEPROM programming tool for EEPROM read/write.
Instrument Panel Cluster (IPC) 84935280
- PART
- 84935280
- CLONE
- Yes
- NOTES
- IPC cloning required for mileage preservation during replacement. Use Launch advanced programming tool or EEPROM programming tool for EEPROM read/write.
Steering Angle Sensor (SAS)
- CODING
- Yes
- NOTES
- INTEGRATED (SCM clock spring)
CONNECTIVITY & ACCESSORIES
Connectivity & Accessories
ICS Infotainment (GMC Infotainment 3 / 3 Plus) ~84 (VERIFY GMDB BY SCREEN SIZE)
- PART
- ~84 (VERIFY GMDB BY SCREEN SIZE)
- NOTES
- SPS programming via TIS2WEB. 8-inch standard, 13.4-inch on Denali/AT4X builds. Apple CarPlay + Android Auto. Wireless CarPlay on 2022+ builds. OTA capable starting 2022 - confirm VIN association after ICS replacement. Confirm screen size variant before ordering replacement unit.
IPC (Instrument Panel Cluster) ~84 (VERIFY GMDB BY TRIM)
- PART
- ~84 (VERIFY GMDB BY TRIM)
- NOTES
- SPS programming via TIS2WEB. Mileage stored in BCM on T1 HD - IPC replacement does not reset odometer. Verify all gauge cluster functions and ProGrade Trailering System display after programming.
ProGrade Trailering System Camera / Module ~84 (VERIFY GMDB)
- PART
- ~84 (VERIFY GMDB)
- NOTES
- Available on SLT/Denali/AT4. Includes trailer camera view integration, trailer tire pressure monitoring, trailer sway detection. GDS2 module setup after replacement. Confirm trailer camera detection with trailer connected. Sway detection relies on EBCM + ProGrade module - verify both modules communicate DTC-free.
Power Steering Control Module (PSCM) ~84 (VERIFY GMDB)
- PART
- ~84 (VERIFY GMDB)
- NOTES
- SPS programming via TIS2WEB. Steering angle sensor calibration after replacement - GDS2 SAS reset. Electric power steering on T1 HD 2020+ - not hydraulic. DTC C0455 if PSCM not programmed.
GATEWAY / SECURITY MODULES
Gateway / Security Modules
Central Gateway Module
- SECURITY
- VIN-locked (UDS)
- VIN LOCKED
- Yes
- CODING
- Yes
- CHIP/MCU
- D70F3558(read-write)
- NOTES
- Compatibility label: Buick. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
Central Gateway Module
- SECURITY
- VIN-locked (UDS)
- VIN LOCKED
- Yes
- CODING
- Yes
- CHIP/MCU
- 2015- 1M12S
- NOTES
- Compatibility label: CRUZE. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
Central Gateway Module
- SECURITY
- VIN-locked (UDS)
- VIN LOCKED
- Yes
- CODING
- Yes
- CHIP/MCU
- 2015- 1M12S
- NOTES
- Compatibility label: Cavalier. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
Central Gateway Module
- SECURITY
- VIN-locked (UDS)
- VIN LOCKED
- Yes
- CODING
- Yes
- CHIP/MCU
- D70F3385(read-write)
- NOTES
- Compatibility label: Chevrolet. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
Central Gateway Module
- SECURITY
- VIN-locked (UDS)
- VIN LOCKED
- Yes
- CODING
- Yes
- CHIP/MCU
- 2015- 1M12S
- NOTES
- Compatibility label: Excelle. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
Central Gateway Module
- SECURITY
- VIN-locked (UDS)
- VIN LOCKED
- Yes
- CODING
- Yes
- CHIP/MCU
- 2015- 1M12S
- NOTES
- Compatibility label: SAIL. Central gateway routes CAN/CAN-FD/Ethernet between module domains. Replacement requires VIN write and as-built configuration load via OEM software (ODIS, FDRS, DTS Monaco, etc.).
KEY SECURITY & IMMOBILIZER
Key Security & Immobilizer
- System GM PASS-Key III+ (T1 HD)
- Add Key Yes
- All Keys Lost Yes
GM PASS-Key III+ / PKES - BCM-linked; GDS2 + TIS2WEB required; generic programmers incompatible
IMMOBILIZER MODULES
Immobilizer Modules
PassKey III+ Immobilizer
- SECURITY
- PASS-Key III+
- NOTES
- PASS-Key III+ on T1 HD. All key programming via GDS2 + TIS2WEB. PIN extraction available via authorized GM SPS2 security access. BCM replacement requires all customer keys present for relearn. AKL (All Keys Lost) requires TIS2WEB dealer-level authorization. Maximum 8 keys registered per vehicle.
KEY & FOB TYPES
Key & Fob Types
Proximity Smart Key Fob ~13529660 (VERIFY GMDB)
- PART
- ~13529660 (VERIFY GMDB)
- NOTES
- GM PASS-Key III+ proximity key. GDS2 + TIS2WEB key learning. Minimum 2 working keys required for add-key. AKL requires TIS2WEB security access. Remote start fob variant available - confirm standard vs remote start fob before ordering. 315MHz or 433MHz by market - confirm before ordering.
Replacement Notes
GM PASS-Key III+ (T1 HD) system. SPS/ACDelco TDS required for key programming and module replacement. Pin code extractable via obd; akl supported.
ARCHITECTURE & CONNECTIVITY
Architecture & Connectivity
- Body Construction
- Body-on-frame; high-strength steel ladder frame; steel cab and bed
- OBD Protocol
- ISO 15765-4 CAN (500kbps HS-CAN)
- CAN Architecture
- GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps
- Infotainment
- GMC Infotainment 3 / Infotainment 3 Plus - 8-inch standard; 13.4-inch Denali/AT4X; Apple CarPlay + Android Auto
- OTA Capable
- No
- Infotainment Name
- GMC Infotainment 3
- ECU Unlock Supported
- Yes
- Custom Programming
- Yes
WHAT WE RESOLVE
4th Gen T1XX (2020-2026) common module and ADAS issues
- ADAS calibration drift Watch for calibration needs after windshield, bumper, suspension, camera, or radar work. Documented systems include Forward Camera (Monocular), Forward Radar (77GHz), Blind Spot Monitor Sensor - Left (BSM), and Blind Spot Monitor Sensor - Right (BSM). Year-marked systems apply only to the shown range.
- SRS crash-data and warning light SRS service can involve Sensing & Diagnostic Module (SDM). Part numbers and crash-data workflow are confirmed for the exact year/VIN.
- Replacement module setup ECU/PCM replacement programming, BCM configuration, TCU/TCM cloning, ABS/EBCM setup are represented in the merged generation data. Rows with year ranges do not apply to every model year; verify by VIN.
- Gateway, key, and immobilizer access Gateway, key, and immobilizer procedures are represented by 8 merged security records. Access and all-keys-lost support varies by year - verify by VIN.
FREQUENTLY ASKED QUESTIONS
FAQ
Can you program GMC Sierra 2500HD (2020-2026) modules?
Yes. Core Auto Logic supports generation-scoped module programming for the GMC Sierra 2500HD (2020-2026). The merged generation data includes ECU/PCM, BCM, TCU/TCM, ABS/EBCM, and SRS coverage. Rows marked with a year range apply only to that part of the span; unmarked rows are present across the merged generation data.
Which modules are documented for GMC Sierra 2500HD (2020-2026)?
The GMC Sierra 2500HD (2020-2026) generation currently shows 14 core module records across ECU/PCM, BCM, TCU/TCM, ABS/EBCM, and SRS groups. SRS examples include Sensing & Diagnostic Module (SDM). Part numbers and module variants must be confirmed for your exact year/VIN. Reference part number: 13524234 - confirm for your exact year/VIN.
Does GMC Sierra 2500HD (2020-2026) need ADAS calibration after glass or collision work?
The merged generation data documents 7 ADAS systems, including Forward Camera (Monocular), Forward Radar (77GHz), Blind Spot Monitor Sensor - Left (BSM), Blind Spot Monitor Sensor - Right (BSM), and HD Surround Vision Camera System (4-camera, if equipped). Calibration triggers include Windshield Replacement, Front Bumper Repair or Replacement, Rear Bumper Repair or Replacement, and DPF / DEF System Service (Diesel L5P). Procedure type is VIN-specific scan-tool procedure; verify exact requirements by VIN before setup.
Can you reset the airbag module on GMC Sierra 2500HD (2020-2026)?
Yes. The generation data includes 4 SRS records, including Sensing & Diagnostic Module (SDM). Bench reset, cloning, and replacement setup are handled after part-number review. Any SRS part number shown for this generation is planning data only - confirm for your exact year/VIN. Reference part number: 13524234 - confirm for your exact year/VIN.
Do all GMC Sierra 2500HD (2020-2026) years use the same parts?
No assumption should be made across the full span. The generation page merges rows across 2020-2026; any row that does not span all data-bearing years is printed with its year range or treated as varies by year - verify by VIN. Part numbers always require exact year/VIN confirmation before ordering, cloning, or programming.
Can you program keys or immobilizer systems for GMC Sierra 2500HD (2020-2026)?
Yes, where the VIN and security workflow support it. The generation data includes 8 gateway, immobilizer, or key-security records. Gateway examples include Central Gateway Module. Key records are present in the merged generation data. Security access, all-keys-lost eligibility, and add-key workflows vary by year - verify by VIN.
How long does service take for GMC Sierra 2500HD (2020-2026)?
Most programming, cloning, SRS, and calibration jobs are quoted after VIN, DTC, part number, and repair-scope review. Labor time varies by year - verify by VIN before scheduling. Mail-in module work typically depends on module condition, donor data, and shipping window.
Is GMC Sierra 2500HD (2020-2026) service mobile or mail-in?
Both paths are available depending on the job. Mobile service covers DFW on-vehicle diagnostics, ADAS setup, key programming, and post-repair coding. Mail-in service covers ECU, BCM, SRS, TCU, ABS, and other bench module work nationwide. We confirm the correct path for your exact year/VIN before scheduling.