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.
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2021 GMC Yukon Supported Services
2021 GMC Yukon
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 T1XX (5th Gen Full-Size SUV)
- CAN Architecture GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); Ethernet backbone on Super Cruise/select modules; OBD2 DLC Pin 6/14 HS-CAN 500kbps
- Security GM PASS-Key III+ - BCM PKE passive entry (SLT+/Denali), RKE 315MHz 128-bit rolling code; no OBD pin extraction; AKL via GDS2 + TIS2WEB dealer authorization
OVERVIEW
Expert ADAS calibration, module programming, and diagnostic recovery for the 2021 GMC Yukon. On this vehicle we cover documented systems include Forward Camera (Monocular), Forward Radar (77GHz), and Blind Spot Monitor Sensor - Left (BSM), this GMT T1XX (5th Gen Full-Size SUV) platform vehicle, GM PASS-Key III+ (T1XX Gen 3) immobilizer support, GMC Infotainment 3 infotainment programming. Mobile across the DFW Metroplex; mail-in module work is temporarily unavailable.
Platform
GMT T1XX (5th Gen Full-Size SUV)
Production
2000-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 / AWD / 4WD
Engine
-
CAN Speed
GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); Ethernet backbone on Super Cruise/select modules; OBD2 DLC Pin 6/14 HS-CAN 500kbps
YEAR-SPECIFIC NOTES
Infotainment
GMC Infotainment 3
Exact-year service summary for 2021 GMC Yukon
ADAS coverage
This 2021 GMC Yukon 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 dataCalibration triggers
Documented calibration triggers include Windshield Replacement (if ADAS Camera Equipped), Forward Camera Replacement, Forward Radar Replacement, and BZA Rear Radar Replacement (either side). Use the ADAS tab for the full trigger list.
View triggersProgrammable modules
This page indexes 27 programmable module records across SRS, ECU, BCM, TCU/TCM, ABS, and IPC coverage.
View modulesGateway and security
This page includes 11 gateway, immobilizer, or key-security records for this 2021 GMC Yukon.
View securityCore Auto Logic capability
Core Auto Logic supports exact-year diagnostics, ADAS calibration, module programming, and security-access planning for the 2021 GMC Yukon using the documented systems and module data on this page.
Choose a sectionWhat changes on this exact year
Feature availability
GM Co-Pilot360: Forward Collision Alert/Automatic Emergency Braking, Lane Change - Available; Immobilizer: GM PASS-Key III+ (T1XX Gen 3) - Standard; Platform: GMT T1XX (5th Gen Full-Size SUV) - Confirmed
Driver-assist suite
GM Co-Pilot360: Forward Collision Alert/Automatic Emergency Braking, Lane Change Alert w/Blind Spot Monitoring, Rear Cross-Traffic Alert, HD Rear Camera, Front Camera Safety Package, Surround View (available), Super Cruise (Denali Ultimate RPO KSG); IntelliBeam auto high beam
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 Premium - 10.2" touchscreen standard; 15" diagonal portrait display on Denali and Denali Ultimate; Apple CarPlay + Android Auto; OTA software updates
Network and access
CAN: GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); Ethernet backbone on Super Cruise/select modules; OBD2 DLC Pin 6/14 HS-CAN 500kbps
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 2021 GMC Yukon. 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 tabEngine / ECU Programming
6 modules documented
Powertrain reprogramming, calibration updates, replacement ECU configuration and security access.
Open Modules tabBCM / Body Programming
4 modules documented
Body control module, gateway and accessory programming. Includes feature-bit reconfiguration.
Open Modules tabGateway / Security Access
6 modules documented
Secure gateway module identification, bypass workflow and security-access planning before programming.
Open Security tabTCU / Transmission
1 module documented
Transmission control module reprogramming, adaptive learning reset and replacement TCM clone.
Open Modules tabSRS / Airbag Reset
3 modules documented
Crash-data clear, hard-code reset and replacement airbag module configuration.
Open Modules tabABS / Brake Module
4 modules documented
ABS / EBCM bleed support, replacement module coding and yaw-rate sensor calibration.
Open Modules tabKey Security & Immobilizer
3 modules documented
Immobilizer modules, key/fob types, add-key + all-keys-lost (AKL) capability and security overview.
Open Security tabIPC, SAS & Other Modules
3 modules documented
Instrument cluster cloning, steering angle sensor calibration and other supporting modules.
Open Modules tabConnectivity & Accessories
6 modules documented
Infotainment radio, surround view, remote start, trailer brake controller and other equipped systems.
Open Modules tabRecalibration Triggers
16 modules documented
Service events that require ADAS recalibration on this vehicle. Tap to see what triggers what.
Open ADAS tabNeed something not listed? Most undocumented modules can still be programmed.
Get a QuoteFeature availability 3
GM Co-Pilot360: Forward Collision Alert/Automatic Emergency Braking, Lane Change
AvailableCalibration required after windshield replacement, camera/radar service, or structural repair affecting sensor alignment.
Immobilizer: GM PASS-Key III+ (T1XX Gen 3)
StandardKey programming requires manufacturer-level tool access.
Platform: GMT T1XX (5th Gen Full-Size SUV)
ConfirmedVerify platform code matches when cross-referencing part numbers across model years.
WHAT WE RESOLVE
Common issues on this vehicle
Common GMC Yukon 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 T1XX (5th Gen Full-Size SUV) platform uses GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); Ethernet backbone on Super Cruise/select modules; OBD2 DLC Pin 6/14 HS-CAN 500kbps. Key programming and immobilizer faults - GM PASS-Key III+ (T1XX Gen 3) immobilizer; all-keys-lost supported.
ADAS CALIBRATION MATRIX
ADAS systems on this vehicle
GM Co-Pilot360: Forward Collision Alert/Automatic Emergency Braking, Lane Change Alert w/Blind Spot Monitoring, Rear Cross-Traffic Alert, HD Rear Camera, Front Camera Safety Package, Surround View (available), Super Cruise (Denali Ultimate RPO KSG); IntelliBeam auto high beam
Scroll for part numbers and Details
| System | Type | Category | Cal. Type | Supported | Part # | Actions |
|---|---|---|---|---|---|---|
| Forward Camera (Monocular) | Camera | ADAS Camera | Static | YES | 84394 (APPROX - VERIFY GMDB BY VIN) | |
| Forward Radar (77GHz) | Radar | ADAS Radar | Static | YES | 84277 (APPROX - VERIFY GMDB) | |
| Blind Spot Monitor Sensor - Left (BSM) | Radar | ADAS Radar | Static + Dynamic | YES | 23234 (APPROX - VERIFY GMDB) | |
| Blind Spot Monitor Sensor - Right (BSM) | Radar | ADAS Radar | Static + Dynamic | YES | 23234 | |
| Surround View Camera System (4-camera) | Camera | Surround Vision | Mat-based static calibration | YES | 84 EACH CAMERA (VERIFY GMDB BY POSITION) | |
| HD Rear Camera | Camera | Rear Vision | None (registration only) | YES | 84495 (APPROX - VERIFY GMDB) | |
| Super Cruise Driver Attention Camera (DAC) | Camera | Super Cruise | Static | YES | - |
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 (if ADAS Camera Equipped) Affected: Forward Camera, FCA, LCA, Super Cruise (Denali Ultimate)
Forward camera static calibration via GDS2. Level surface. GM forward target chart at WSM-specified distance. Confirm FCA, LCA, and Super Cruise DTC-free post-cal.
Forward Camera Replacement Affected: Forward Camera, FCA, LCA, Super Cruise
GDS2 camera initialization + static calibration. Verify bracket not damaged. Confirm all ADAS DTC-free.
Forward Radar Replacement Affected: Forward Radar, FCA, Adaptive Cruise, Super Cruise
GDS2 radar alignment. Level surface, no metallic obstructions. Verify all radar-dependent ADAS DTC-free.
BZA Rear Radar Replacement (either side) Affected: BZA, RCTA
GDS2 BZA module initialization. Fixed mount - no physical aiming. DTC clear. Road verify at 20+ mph.
Surround View Camera Replacement (any camera) Affected: Surround View System
GDS2 surround view calibration with mat J-49878. All 4 cameras calibrated together on flat level surface. Verify image tiling and orientation on IOR display. Do not perform partial calibration.
Super Cruise DAC Replacement (Denali Ultimate) Affected: Super Cruise
GDS2 + TIS2WEB Super Cruise DAC initialization. Active OnStar required. Verify Super Cruise engage/disengage on highway.
BCM Replacement Affected: BCM, PASS-Key III+, Remote Start, BSM, Super Cruise RPO KSG
SPS programming (TIS2WEB) + VIN tie + all vehicle options + PASS-Key III+ relearn with all keys present. Verify Super Cruise RPO KSG if Denali Ultimate. Reconfigure power running boards, liftgate, trailer, Surround View as equipped.
ECM Replacement Affected: ECM, PASS-Key III+, Throttle, AFM/DFM
SPS programming + VIN tie + PASS-Key parameter transfer + idle/throttle relearn + AFM/DFM adaptation reset. Diesel: DPF adaptation reset additionally required.
EBCM / ABS Module Replacement Affected: ABS, StabiliTrak, SAS
GDS2 ABS/ESC initialization + 4-wheel brake bleed + SAS zero-point calibration. Drive 35+ mph straight on level surface. StabiliTrak warning remains until SAS learning completes.
Rear Suspension Component R&R (IRS - 2021+) Affected: Ride Height, SAS, StabiliTrak
2021+ Yukon has independent rear suspension. Ride height sensor calibration required via GDS2 after any rear suspension component replacement. SAS zero-point reset if alignment disturbed. Verify no suspension, ABS, or StabiliTrak DTC after calibration.
TCM Replacement Affected: Transmission
GDS2 TCM quick learn procedure + adaptive data reset. SPS programming if required per RPO. Verify smooth shift quality through all 10 gears on road test.
Any Front-End Collision
Inspect and recalibrate forward camera after any front-end collision using GDS2/MDI2.
Front Bumper Repair or Replacement
Forward radar angular alignment required after front bumper R&R. Use GDS2/MDI2.
Rear Bumper Repair or Replacement
BSD radar alignment required after rear bumper R&R. Use 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) 13518546
- PART
- 13518546
- 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.
ECU MODULES
ECU Modules
ECM - L84 5.3L V8 EcoTec3 (standard engine) 12694 (APPROX - VERIFY GMDB BY VIN)
- PART
- 12694 (APPROX - VERIFY GMDB BY VIN)
- PROTOCOL
- SPS / TIS2WEB
- CODING
- Yes
- CLONE
- No
- NOTES
- SPS programming via TIS2WEB. VIN tie required. PASS-Key III+ security parameter transfer from old ECM. AFM (Active Fuel Management) adaptation reset after replacement. Cam phaser relearn via GDS2. Injector balance rate reset. Idle relearn.
ECM - L87 6.2L V8 EcoTec3 (Denali/Denali Ultimate) 12697 (APPROX - VERIFY SUFFIX BY VIN)
- PART
- 12697 (APPROX - VERIFY SUFFIX BY VIN)
- PROTOCOL
- SPS / TIS2WEB
- CODING
- Yes
- CLONE
- No
- NOTES
- SPS programming via TIS2WEB. VIN tie. DFM (Dynamic Fuel Management) adaptation reset. Cam phaser relearn. PASS-Key parameter transfer.
ECM - LM2 3.0L Duramax Diesel (if equipped) 12708 (APPROX - VERIFY GMDB BY VIN)
- PART
- 12708 (APPROX - VERIFY GMDB BY VIN)
- PROTOCOL
- SPS / TIS2WEB
- CODING
- Yes
- CLONE
- No
- NOTES
- SPS programming via TIS2WEB. VIN tie + PASS-Key parameter transfer. DIESEL SPECIFIC: DPF adaptation reset required after ECM replacement. Injector return flow calibration. Glow plug module communication check. DEF system check via GDS2. Allow extra SPS time on TIS2WEB for diesel ECM.
TCM - 10L80 10-Speed Automatic 24285 (APPROX - VERIFY GMDB)
- PART
- 24285 (APPROX - VERIFY GMDB)
- PROTOCOL
- GDS2 quick learn + SPS if required
- CODING
- Yes
- CLONE
- No
- NOTES
- GDS2 TCM quick learn procedure after replacement. Adaptive shift data reset. SPS programming if required per RPO. Verify smooth shift quality through all 10 gears on road test.
EBCM (Electronic Brake Control Module) 84 (CONTINENTAL
- PART
- 84 (CONTINENTAL
- PROTOCOL
- GDS2
- CODING
- Yes
- CLONE
- No
- NOTES
- GDS2 ABS/StabiliTrak initialization + 4-wheel brake bleed + SAS zero-point calibration. Drive straight 35+ mph on level surface after reset. NOTE: 2021+ Yukon has independent rear suspension - ride height sensor calibration required after rear suspension work in addition to SAS calibration.
Ride Height Control Module (IRS-equipped) 84 (VERIFY GMDB)
- PART
- 84 (VERIFY GMDB)
- PROTOCOL
- GDS2
- CODING
- Yes
- CLONE
- No
- NOTES
- 2021+ Yukon independent rear suspension with available air ride or magnetic ride control. GDS2 ride height sensor calibration required after any rear suspension component replacement or ride height module replacement. Calibration must be performed on level surface with vehicle at proper unladen weight. Verify all suspension DTC clear after calibration.
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
- No
- NOTES
- SPS programming via TIS2WEB required after replacement. Configure all vehicle options in BCM calibration via GDS2 (trailer, heated seats, remote start, BSM, Surround View, Super Cruise RPO KSG if Denali Ultimate, power running boards, power liftgate). VIN programming required. OTA module 2021+ - verify connectivity after replacement.
Trailer Brake Control Module (if equipped) 23360 (APPROX - VERIFY GMDB)
- PART
- 23360 (APPROX - VERIFY GMDB)
- SECURITY
- None
- CODING
- Yes
- CLONE
- No
- NOTES
- Integrated trailer brake controller. GDS2 configuration for trailer type/weight. User-adjustable gain via IOR infotainment interface.
HVAC Control Module 84 (VERIFY GMDB)
- PART
- 84 (VERIFY GMDB)
- SECURITY
- None
- CODING
- Yes
- CLONE
- No
- NOTES
- Tri-zone or quad-zone auto climate. GDS2 HVAC actuator calibration after replacement. Verify all zones operational.
IPM (Integrated Power Module) 84 (VERIFY GMDB)
- PART
- 84 (VERIFY GMDB)
- SECURITY
- None
- CODING
- Yes
- CLONE
- No
- NOTES
- Fuse/relay distribution. SPS programming if module-equipped variant. Verify all circuits post-replacement.
TCU / TCM TRANSMISSION MODULES
TCU / TCM Transmission Modules
TCU - 10L80 10-Speed Auto 24291766
- PART
- 24291766
- PROTOCOL
- Bench
- CODING
- Yes
- CLONE
- Yes
- CHIP/MCU
- NXP MPC5748G
- NOTES
- New T1 platform. GM GDS2/MDI2 required. Mobil 1 Synthetic LV ATF HP. 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
- No
- NOTES
- GDS2 ABS/ESC initialization + 4-wheel brake bleed (GDS2 automated bleed preferred or pressure bleed). Steering angle sensor zero-point calibration required - GDS2 SAS reset, then drive straight at 35+ mph on level surface. StabiliTrak warning remains until SAS learning completes.
Wheel Speed Sensor - Front (each) 13512 (APPROX - VERIFY GMDB)
- PART
- 13512 (APPROX - VERIFY GMDB)
- CLONE
- No
- NOTES
- Active magnetic sensor. Torque to WSM spec.
Wheel Speed Sensor - Rear (each) 13512 REAR VARIANT (VERIFY GMDB)
- PART
- 13512 REAR VARIANT (VERIFY GMDB)
- CLONE
- No
- NOTES
- Same procedure as front WSS. NOTE: 2021+ Yukon IRS - rear WSS is different from K2XX solid axle design; verify correct part by VIN.
Brake Pressure Modulator (HCU) 84 (VERIFY GMDB)
- PART
- 84 (VERIFY GMDB)
- CLONE
- No
- NOTES
- GDS2 automated bleed sequence strongly preferred after HCU replacement. Verify firm pedal - no spongy pedal before road test.
OTHER MODULES (IPC, SAS)
Other Modules (IPC, SAS)
Instrument Panel Cluster (IPC) 85119382
- PART
- 85119382
- 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) 85577580
- PART
- 85577580
- 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
OnStar Module (Super Cruise dependency) 84 (VERIFY GMDB)
- PART
- 84 (VERIFY GMDB)
- NOTES
- GDS2 OnStar initialization. Active OnStar subscription required for Super Cruise, OTA updates, and remote features. Modem VIN-tied - GDS2 + OnStar reactivation after replacement.
Super Cruise System (Denali Ultimate RPO KSG)
- NOTES
- Hands-free highway driving. Requires RPO KSG in BCM. GDS2 + TIS2WEB initialization after any sensor replacement. Active OnStar subscription and LiDAR map data required. Verify Super Cruise engage/disengage on highway post-service.
Trailer Brake Controller (integrated) 23360 (APPROX - VERIFY GMDB)
- PART
- 23360 (APPROX - VERIFY GMDB)
- NOTES
- GDS2 trailer type/weight configuration. IOR gain adjustment interface. 7-pin and 4-pin trailer connector verify.
Power Running Boards (if equipped) OEM GM (84 - VERIFY GMDB)
- PART
- OEM GM (84 - VERIFY GMDB)
- NOTES
- BCM controls power running boards. GDS2 BCM calibration if boards are non-responsive after BCM replacement.
Power Liftgate
- NOTES
- GDS2 power liftgate module initialization after replacement. Height adjustment via IOR. Verify obstruction detection.
Remote Start (OEM RKE-based) (BCM PARAMETER - RPO AP9, UF8)
- PART
- (BCM PARAMETER - RPO AP9, UF8)
- NOTES
- BCM AsBuilt parameter for remote start enable. GDS2 BCM configuration. OEM remote start via RKE 315MHz fob sequence.
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+ (T1XX Gen 3)
- Add Key Yes
- All Keys Lost Yes
GM PASS-Key III+ - BCM PKE passive entry (SLT+/Denali), RKE 315MHz 128-bit rolling code; no OBD pin extraction; AKL via GDS2 + TIS2WEB dealer authorization
IMMOBILIZER MODULES
Immobilizer Modules
PassKey III+ Immobilizer 84252 (APTIV - VERIFY GMDB)
- PART
- 84252 (APTIV - VERIFY GMDB)
- SECURITY
- PASS-Key III+
- NOTES
- Replacement erases all keys. SPS programming (TIS2WEB) + key relearn with ALL customer keys present mandatory.
ECM (PASS-Key Security Seed) 12694, 12697, 12708 (ENGINE-DEPENDENT - VERIFY GMDB)
- PART
- 12694, 12697, 12708 (ENGINE-DEPENDENT - VERIFY GMDB)
- SECURITY
- PASS-Key III+
- NOTES
- ECM paired to BCM for PASS-Key III+ security. SPS programming after ECM replacement includes security parameter transfer. No standalone relearn without TIS2WEB.
Key Fob / Transponder 13508771 OR CURRENT GM NUMBER (VERIFY GMDB)
- PART
- 13508771 OR CURRENT GM NUMBER (VERIFY GMDB)
- SECURITY
- PASS-Key III+ rolling code
- NOTES
- GDS2 + TIS2WEB dealer authorization for add key or AKL. No OBD pin extraction.
KEY & FOB TYPES
Key & Fob Types
Standard RKE Key Fob 13508771 (OR CURRENT GM NUMBER - VERIFY GMDB)
- PART
- 13508771 (OR CURRENT GM NUMBER - VERIFY GMDB)
- NOTES
- 315MHz RKE (Yukon - NOT 433MHz). PKE passive entry on SLT+/Denali/Denali Ultimate. GDS2 + TIS2WEB dealer authorization for add key or AKL. Rolling 128-bit code. Battery CR2032. AKL erases all keys - all customer keys must be present.
Emergency Mechanical Key Blade
- NOTES
- Door lock only. Does NOT bypass PASS-Key III+ for engine start.
Replacement Notes
BCM replacement requires SPS programming (TIS2WEB) + PASS-Key III+ relearn with all customer keys present. ECM replacement: SPS + VIN tie + PASS-Key parameter transfer. Diesel ECM: DPF adaptation reset additionally required. No OBD pin extraction. AKL: GDS2 + TIS2WEB dealer authorization.
ARCHITECTURE & CONNECTIVITY
Architecture & Connectivity
- Body Construction
- Body-on-frame; high-strength steel ladder frame; SUV body
- OBD Protocol
- ISO 15765-4 CAN (500 kbps HS-CAN)
- CAN Architecture
- GMLAN (HS-CAN 500kbps + MS-CAN 33.3kbps); Ethernet backbone on Super Cruise/select modules; OBD2 DLC Pin 6/14 HS-CAN 500kbps
- Infotainment
- GMC Infotainment 3 Premium - 10.2" touchscreen standard; 15" diagonal portrait display on Denali and Denali Ultimate; Apple CarPlay + Android Auto; OTA software updates
- OTA Capable
- Yes
- Infotainment Name
- GMC Infotainment 3
- ECU/TCM Unlocking
- Contact us
- ECU/TCM Flashing
- Confirmed
Reviewed coverage: 2021 - 5.3L V8 EcoTec III 16v (L84).
Confirm the exact engine, ECU, and any prerequisite access method before service.
OPENPILOT / COMMA.AI
Openpilot Compatibility
Not Supported
Not supported - yukon 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 2021 GMC Yukon?
ADAS calibration pricing for a 2021 GMC Yukon 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 Surround View Camera System (4-camera). 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 2021 GMC Yukon?
Yes. The 2021 GMC Yukon 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: 13518546. 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 2021 GMC Yukon?
After windshield replacement on a 2021 GMC Yukon, Forward Camera (Monocular), Forward Radar (77GHz), Surround View Camera System (4-camera), HD Rear Camera, and Super Cruise Driver Attention Camera (DAC) 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 2021 GMC Yukon module service take?
Most 2021 GMC Yukon onsite jobs are typically scheduled within 24-48 hours once vehicle readiness, access, and route timing are confirmed. This vehicle has roughly 33 programmable modules documented in our database (6 ECU, 4 BCM, 1 TCU, 4 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 2021 GMC Yukon 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 2021 GMC Yukon. Do not ship a module unless support confirms next steps.
What kind of warranty do you offer on 2021 GMC Yukon programming?
Every programming, cloning, and calibration job on the 2021 GMC Yukon 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 2021 GMC Yukon with no working keys (all-keys-lost)?
Yes - all-keys-lost is supported on the 2021 GMC Yukon. Immobilizer generation on this platform: GM PASS-Key III+ (T1XX Gen 3). 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 2021 GMC Yukon can you actually service?
We program, clone, repair, or replace the full programmable-module stack on a 2021 GMC Yukon. For this vehicle our database documents:
- 6 engine control (ECU/PCM)
- 1 transmission control (TCU/TCM)
- 4 body control (BCM and related)
- 4 ABS / brake control (EBCM)
- 3 immobilizer / security
- 2 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.
Additional Module Part Numbers
Additional OEM-sourced part numbers for the 2021 GMC Yukon 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.
- ADAS Module Part Numbers
- 84394, 84277, 23234, 84, 84495
- ECU / PCM Part Numbers
- 12694, 12697, 12708
- BCM / Body Module Part Numbers
- 84252 (APTIV SECURECONNECT GEN 3 - VERIFY GMDB), 23360 (APPROX - VERIFY GMDB), 84 (VERIFY GMDB)
- TCU / TCM Part Numbers
- 24291766
- SRS / Airbag Module Part Numbers
- 13518546, 84396838, 84396837
- ABS / EBCM Part Numbers
- 84528
- Instrument Cluster (IPC) Part Numbers
- 85119382, 85577580
- Transmission Control Module (TCM) Part Numbers
- 24291766
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.
Different trim or build?
Send your VIN and we'll confirm exact module support and pricing in the quote response.
Hit a security wall? We've got the keys.
1-year unlimited warranty on every flash and calibration.
Shared module fitment
Vehicles sharing modules with the 2021 GMC Yukon
These vehicles use one or more of the same replacement modules indexed for this vehicle.