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2020 GMC Sierra-2500HD Supported Services

2020 GMC Sierra-2500HD

ADAS calibration, module programming, and security relearns

Multiple trim levels available. ADAS feature availability varies by trim and options package. Contact us for specific trim calibration requirements.

Technical snapshot

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

Get a Quote See Supported Modules

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 module work is temporarily unavailable.

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

YEAR-SPECIFIC NOTES

VIN / Build Split

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.

Infotainment

GMC Infotainment 3

SERVICE SNAPSHOT

Exact-year service summary for 2020 GMC Sierra-2500hd

ADAS coverage

This 2020 GMC Sierra-2500hd page documents 7 ADAS systems, including Forward Camera (Monocular), Forward Radar (77GHz), Blind Spot Monitor Sensor - Left (BSM), and Blind Spot Monitor Sensor - Right (BSM).

View ADAS data

Calibration triggers

Documented calibration triggers include Windshield Replacement, Front Bumper Repair or Replacement, Rear Bumper Repair or Replacement, and DPF / DEF System Service (Diesel L5P). Use the ADAS tab for the full trigger list.

View triggers

Programmable modules

This page indexes 21 programmable module records across SRS, ECU, BCM, TCU/TCM, ABS, and IPC coverage.

View modules

Gateway and security

This page includes 8 gateway, immobilizer, or key-security records for this 2020 GMC Sierra-2500hd.

View security

Core Auto Logic capability

Core Auto Logic supports exact-year diagnostics, ADAS calibration, module programming, and security-access planning for the 2020 GMC Sierra-2500hd using the documented systems and module data on this page.

Choose a section

EXACT-YEAR DIFFERENTIATORS

What changes on this exact year

Feature availability

GM Safety Package: Forward Collision Alert/Automatic Emergency Braking, Lane Cha - Available; Immobilizer: GM PASS-Key III+ (T1 HD) - Standard; Platform: GMT T1 HD (Heavy Duty) - Confirmed

Driver-assist suite

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)

VIN and build split

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.

Infotainment context

GMC Infotainment 3; GMC Infotainment 3 / Infotainment 3 Plus - 8-inch standard; 13.4-inch Denali/AT4X; Apple CarPlay + Android Auto

Network and access

CAN: GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps

TOOL ACCESS MATRIX

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.

Choose a section to view data

SUPPORTED SYSTEMS

What we service on this vehicle

Documented module coverage for the 2020 GMC Sierra-2500HD. Counts reflect modules our techs have programmed or calibrated on this exact platform.

ADAS Calibration

7 modules documented

Forward camera, radar, surround-view and lane-keep recalibration after windshield, suspension or fascia work.

Open ADAS tab

Engine / ECU Programming

5 modules documented

Powertrain reprogramming, calibration updates, replacement ECU configuration and security access.

Open Modules tab

BCM / Body Programming

3 modules documented

Body control module, gateway and accessory programming. Includes feature-bit reconfiguration.

Open Modules tab

Gateway / Security Access

6 modules documented

Secure gateway module identification, bypass workflow and security-access planning before programming.

Open Security tab

TCU / Transmission

1 module documented

Transmission control module reprogramming, adaptive learning reset and replacement TCM clone.

Open Modules tab

SRS / Airbag Reset

4 modules documented

Crash-data clear, hard-code reset and replacement airbag module configuration.

Open Modules tab

ABS / Brake Module

1 module documented

ABS / EBCM bleed support, replacement module coding and yaw-rate sensor calibration.

Open Modules tab

Key Security & Immobilizer

1 module documented

Immobilizer modules, key/fob types, add-key + all-keys-lost (AKL) capability and security overview.

Open Security tab

IPC, SAS & Other Modules

3 modules documented

Instrument cluster cloning, steering angle sensor calibration and other supporting modules.

Open Modules tab

Connectivity & Accessories

4 modules documented

Infotainment radio, surround view, remote start, trailer brake controller and other equipped systems.

Open Modules tab

Recalibration Triggers

11 modules documented

Service events that require ADAS recalibration on this vehicle. Tap to see what triggers what.

Open ADAS tab

Need something not listed? Most undocumented modules can still be programmed.

Get a Quote

Feature availability 3

GM Safety Package: Forward Collision Alert/Automatic Emergency Braking, Lane Cha

Available

Calibration required after windshield replacement, camera/radar service, or structural repair affecting sensor alignment.

Immobilizer: GM PASS-Key III+ (T1 HD)

Standard

Key programming requires manufacturer-level tool access.

Platform: GMT T1 HD (Heavy Duty)

Confirmed

Verify platform code matches when cross-referencing part numbers across model years.

WHAT WE RESOLVE

Common issues on this vehicle

Common GMC Sierra-2500hd issues we resolve on this platform: Forward Camera (Monocular), Forward Radar (77GHz), Blind Spot Monitor Sensor - Left (BSM), and Blind Spot Monitor Sensor - Right (BSM) recalibration after windshield/bumper/suspension/CCM service. Module programming for replacement ECU/PCM, BCM, TCU, or accessory modules - GMT T1 HD (Heavy Duty) platform uses GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); LIN bus body peripherals; OBD2 DLC Pin 6/14 HS-CAN 500kbps. Key programming and immobilizer faults - GM PASS-Key III+ (T1 HD) immobilizer; all-keys-lost supported.

ADAS CALIBRATION MATRIX

ADAS systems on this vehicle

Scroll for part numbers and Details

System	Type	Category	Cal. Type	Supported	Part #
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)

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.

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. 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. 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.

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. 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.

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/TCM Unlocking: Contact us
ECU/TCM Flashing: Contact us

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.

FREQUENTLY ASKED QUESTIONS

FAQ

How much does ADAS calibration cost for a 2020 GMC Sierra-2500hd?

ADAS calibration pricing for a 2020 GMC Sierra-2500hd depends on which of its 7 documented systems need work after a repair. This vehicle is documented with 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). We provide a fixed quote after confirming the operations performed - send the VIN, the repair scope (windshield R&R, bumper work, alignment, collision), and any DTCs so the quote response can include a real number.

Can you reset the airbag light on a 2020 GMC Sierra-2500hd?

Yes. The 2020 GMC Sierra-2500hd uses a factory SRS control module that we support. We read and clear stored crash data, then restore the module to factory status so the airbag warning light goes out and the system returns to full operation. Reference part number on this vehicle: 13524234. Mobile diagnosis and programming are the active service path. Mail-in bench intake is temporarily unavailable. Send the part number and a description of what triggered the light, and we will provide a quote and scheduling window.

What is needed after replacing the windshield on a 2020 GMC Sierra-2500hd?

After windshield replacement on a 2020 GMC Sierra-2500hd, Forward Camera (Monocular), Forward Radar (77GHz), HD Surround Vision Camera System (4-camera, if equipped), and HD Rear Camera / Hitch Guidance rely on the forward-facing camera and require recalibration before the systems return to operation. We perform the calibration on-site in the DFW Metroplex with OE target fixtures. Mail-in intake is temporarily unavailable.

How long does a 2020 GMC Sierra-2500hd module service take?

Most 2020 GMC Sierra-2500hd onsite jobs are typically scheduled within 24-48 hours once vehicle readiness, access, and route timing are confirmed. This vehicle has roughly 24 programmable modules documented in our database (5 ECU, 3 BCM, 1 TCU, 1 ABS, plus IPC/SAS/gateway/accessory). Mobile module work and ADAS calibration are scheduled in the DFW service area after quote review. Mail-in module intake is temporarily unavailable.

Do you cover the 2020 GMC Sierra-2500hd on-site, or is this mail-in only?

We run a mobile unit across the DFW Metroplex for on-vehicle work (ADAS calibration, key programming, IMMO pairing, post-repair recoding, and supported module work). Mail-in module intake is temporarily unavailable. Quote the work and we will confirm the active service path for the 2020 GMC Sierra-2500hd. Do not ship a module unless support confirms next steps.

What kind of warranty do you offer on 2020 GMC Sierra-2500hd programming?

Every programming, cloning, and calibration job on the 2020 GMC Sierra-2500hd is backed by a workmanship warranty covering the scope of work we performed: 1-year unlimited on all flashes, clones, and ADAS calibrations. If a module we programmed or a calibration we performed fails to function as expected, return it and we restore it at no charge. The warranty covers our work; it does not cover unrelated mechanical or electrical failure of the module itself.

Can you program a 2020 GMC Sierra-2500hd with no working keys (all-keys-lost)?

Yes - all-keys-lost is supported on the 2020 GMC Sierra-2500hd. Immobilizer generation on this platform: GM PASS-Key III+ (T1 HD). Adding a key (with a working key already in hand) is also supported - typically faster and less expensive than an all-keys-lost reset. Submit the VIN and we will confirm the procedure and quote before scheduling.

Which modules on a 2020 GMC Sierra-2500hd can you actually service?

We program, clone, repair, or replace the full programmable-module stack on a 2020 GMC Sierra-2500hd. For this vehicle our database documents:

5 engine control (ECU/PCM)
1 transmission control (TCU/TCM)
3 body control (BCM and related)
1 ABS / brake control (EBCM)
1 immobilizer / security
1 key & fob
2 instrument cluster (IPC)
1 steering angle sensor (SAS)
7 ADAS module

Infotainment on this platform: GMC Infotainment 3. Send the VIN and the operations performed and we will confirm support and pricing.

OTHER MODEL YEARS

2026 2025 2024 2023 2022 2021 2019 2018 2017 2016 2020

OTHER GMC MODELS

Sierra-1500 Acadia Yukon Canyon Terrain Savana Yukon-Xl Hummer-EV

Additional Module Part Numbers

Additional OEM-sourced part numbers for the 2020 GMC Sierra-2500HD covering ADAS, ECU/PCM, BCM, TCU/TCM, SRS, ABS/EBCM, instrument cluster (IPC), gateway, and steering angle sensor modules when available. These reference numbers assist technicians with module identification and sourcing prior to programming.

ECU / PCM Part Numbers: 12683014, 12670950, 12720006, 2017-2023), 6.6L L8T GAS V8 (E90 FAMILY
BCM / Body Module Part Numbers: ~84252 (APTIV SECURECONNECT GEN 3 - VERIFY GMDB), ~84 (VERIFY GMDB BY DRIVETRAIN), ~23360 (VERIFY GMDB)
TCU / TCM Part Numbers: 24292130
SRS / Airbag Module Part Numbers: 13524234, 84396838, 84396837, 13514198
ABS / EBCM Part Numbers: 84528
Instrument Cluster (IPC) Part Numbers: 84682069, 84935280
Transmission Control Module (TCM) Part Numbers: 24292130

Part numbers are OEM base references. Verify exact suffix via VIN-specific build data before ordering. Core Auto Logic provides mobile programming services for all listed modules in the DFW area.

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