VIN / Build Split
VIN pos 4-8 identifies series/body/engine. GM WMI: 1G1 (Chevy car), 1GC (Chevy truck), 3GN (Chevy SUV). Position 8 = engine code. Position 10 = model year code.
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2021 Chevrolet Silverado-1500 Supported Services
2021 Chevrolet Silverado-1500
ADAS calibration, module programming, and security relearns
Trims: LS, LT, RST, LTZ, High Country. Chevy Safety Assist standard all (2022+). Super Cruise on High Country.
Technical snapshot
- Platform GMT T1XX (4th Gen - Mid-Cycle Refresh)
- CAN Architecture GMLAN (HS-CAN + MS-CAN), Ethernet backbone on IOR/camera systems
- Security GM SecureConnect Gen 3 - PKE, RKE 433.92MHz 128-bit rolling code, PASS-Key III+
What do you need fixed?
Choose a service to start your quote.
OVERVIEW
Expert ADAS calibration, module programming, and diagnostic recovery for the 2021 Chevrolet Silverado-1500. On this vehicle we cover documented systems include Forward Camera (Monocular), Forward Radar (77GHz), and Blind Spot Monitor Sensor - Left (BSM), this GMT T1XX (4th Gen - Mid-Cycle Refresh) platform vehicle, GM PASS-Key III+ (T1XX Gen 3) immobilizer support, Chevrolet Infotainment 3 infotainment programming. Mobile across the DFW Metroplex; mail-in module service is available nationwide.
Platform
GMT T1XX (4th Gen - Mid-Cycle Refresh)
Production
1999-present
Trim Levels
Trims: LS, LT, RST, LTZ, High Country. Chevy Safety Assist standard all (2022+). Super Cruise on High Country.
Drivetrain
RWD / AWD / 4WD
Engine
-
CAN Speed
GMLAN (HS-CAN + MS-CAN), Ethernet backbone on IOR/camera systems
YEAR-SPECIFIC NOTES
Infotainment
Chevrolet Infotainment 3
Exact-year service summary for 2021 Chevrolet Silverado-1500
ADAS coverage
This 2021 Chevrolet Silverado-1500 page documents 6 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, Surround View Camera Replacement, Forward Camera Replacement, and Forward Radar Replacement. Use the ADAS tab for the full trigger list.
View triggersProgrammable modules
This page indexes 24 programmable module records across SRS, ECU, BCM, TCU/TCM, ABS, and IPC coverage.
View modulesGateway and security
This page includes 9 gateway, immobilizer, or key-security records for this 2021 Chevrolet Silverado-1500.
View securityCore Auto Logic capability
Core Auto Logic supports exact-year diagnostics, ADAS calibration, module programming, and security-access planning for the 2021 Chevrolet Silverado-1500 using the documented systems and module data on this page.
Choose a sectionWhat changes on this exact year
Feature availability
Available: Forward Collision Alert/Automatic Emergency Braking, Lane Change Aler - Available; Platform: GMT T1XX (4th Gen - Confirmed
Driver-assist suite
Available: Forward Collision Alert/Automatic Emergency Braking, Lane Change Alert w/Blind Spot Monitoring, Rear Cross-Traffic Alert, Multi-Camera Surround Vision (optional), HD Rear Camera
VIN and build split
VIN pos 4-8 identifies series/body/engine. GM WMI: 1G1 (Chevy car), 1GC (Chevy truck), 3GN (Chevy SUV). Position 8 = engine code. Position 10 = model year code.
Infotainment context
Chevrolet Infotainment 3; Chevrolet Infotainment 3 Plus (8") or 3 Premium (13.4" High Country), Apple CarPlay + Android Auto
Network and access
CAN: GMLAN (HS-CAN + MS-CAN), Ethernet backbone on IOR/camera systems
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.
ADAS scan, setup, and verification
Autel, Launch Tech, Topdon
Used where aftermarket coverage supports the procedure; OEM software remains required for locked factory routines.
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
Choose a section to view data
SUPPORTED SYSTEMS
What we service on this vehicle
Documented module coverage for the 2021 Chevrolet Silverado-1500. Counts reflect modules our techs have programmed or calibrated on this exact platform.
ADAS Calibration
6 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
3 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
2 modules documented
Transmission control module reprogramming, adaptive learning reset and replacement TCM clone.
Open Modules tabSRS / Airbag Reset
4 modules documented
Crash-data clear, hard-code reset and replacement airbag module configuration.
Open Modules tabABS / Brake Module
2 modules documented
ABS / EBCM bleed support, replacement module coding and yaw-rate sensor calibration.
Open Modules tabIPC, SAS & Other Modules
4 modules documented
Instrument cluster cloning, steering angle sensor calibration and other supporting modules.
Open Modules tabConnectivity & Accessories
3 modules documented
Infotainment radio, surround view, remote start, trailer brake controller and other equipped systems.
Open Modules tabRecalibration Triggers
12 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 2
Available: Forward Collision Alert/Automatic Emergency Braking, Lane Change Aler
AvailableCalibration required after windshield replacement, camera/radar service, or structural repair affecting sensor alignment.
Platform: GMT T1XX (4th Gen
ConfirmedVerify platform code matches when cross-referencing part numbers across model years.
WHAT WE RESOLVE
Common issues on this vehicle
Common Chevrolet Silverado-1500 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 (4th Gen - Mid-Cycle Refresh) platform uses GMLAN (HS-CAN + MS-CAN), Ethernet backbone on IOR/camera systems.
ADAS CALIBRATION MATRIX
ADAS systems on this vehicle
Available: Forward Collision Alert/Automatic Emergency Braking, Lane Change Alert w/Blind Spot Monitoring, Rear Cross-Traffic Alert, Multi-Camera Surround Vision (optional), HD Rear Camera
Scroll for part numbers and Details
| System | Type | Category | Cal. Type | Supported | Part # | Actions |
|---|---|---|---|---|---|---|
| Forward Camera (Monocular) | Camera | ADAS | Static | YES | 84394 (UPDATED VARIANT) | |
| Forward Radar (77GHz) | Radar | ADAS | Static + Dynamic | YES | 84277 | |
| Blind Spot Monitor Sensor - Left (BSM) | Radar | ADAS | Static + Dynamic | YES | 23234 | |
| Blind Spot Monitor Sensor - Right (BSM) | Radar | ADAS | Static + Dynamic | YES | 23234 | |
| Surround View Camera System (optional) | Camera | ADAS | Static | YES | 84 (4-CAMERA SET) | |
| HD Rear Camera | Camera | ADAS | Static | YES | 84495 |
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
Forward camera GDS2 static cal (if equipped). Level surface, target per WSM.
Surround View Camera Replacement
GDS2 guided calibration with calibration mat J-49878. All 4 cameras must be calibrated in same session. Vehicle on level surface. Allow 15-20 min for GDS2 to complete full surround cal.
Forward Camera Replacement
GDS2 init + static cal.
Forward Radar Replacement
GDS2 alignment.
BCM Replacement
SPS + VIN + all options including Surround View + PASS-Key relearn.
ECM Replacement
SPS + VIN + PASS-Key. Diesel: DPF reset.
EBCM Replacement
GDS2 ABS init + bleed + SAS zero-point. 35+ mph straight run.
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
Sensing & Diagnostic Module (SDM) 84396837
- Part number
- 84396837
- Location
- Under center console
- Manufacturer
- 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 number
- 84396838
- Location
- Under center console
- Manufacturer
- 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) 84743878
- Part number
- 84743878
- Location
- Under center console
- Manufacturer
- 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) 84965378
- Part number
- 84965378
- Location
- Under center console
- Manufacturer
- 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
ECM - L84 5.3L V8 12694
- Part number
- 12694
- Notes
- SPS + VIN + AFM adaptation reset.
ECM - L87 6.2L V8 12697
- Part number
- 12697
- Notes
- SPS + VIN + DFM adaptation reset.
ECM - LM2 3.0L Duramax 12708
- Part number
- 12708
- Notes
- SPS + VIN + DPF adaptation reset + injector calibration.
ECM - L3B 2.7L Turbo 12697
- Part number
- 12697
- Notes
- SPS + VIN + throttle relearn.
IOR - 13.4" Infotainment (High Country) 84 (LARGE FORMAT)
- Part number
- 84 (LARGE FORMAT)
- Notes
- GDS2 IOR programming. Verify correct programming file for 13.4" variant - NOT interchangeable with 8" IOR file.
BCM Modules
Body Control Module (BCM) 84252
- Part number
- 84252
- Notes
- SPS (TIS2WEB) + VIN + options (Surround View, BSM, trailer) + PASS-Key relearn all keys. 13.4" IOR variants require additional BCM option configuration.
HVAC Control Module 84
- Part number
- 84
- Notes
- GDS2 HVAC actuator calibration after replacement.
Trailer Brake Controller 23360
- Part number
- 23360
- Notes
- GDS2 configuration.
TCU / TCM Transmission Modules
TCU - 8L90E 8-Speed Auto 24282
- Part number
- 24282
- Protocol / method
- J2534
- Coding required
- Yes
- Cloning supported
- Yes
- Chip / MCU
- Continental MPC5775K
- Notes
- Requires GM SPS2 programming, transmission adaptive learn procedure, Dexron VI ATF
TCU - 10L80E 10-Speed Auto 24282
- Part number
- 24282
- Protocol / method
- J2534
- Coding required
- Yes
- Cloning supported
- Yes
- Chip / MCU
- Continental MPC5775K
- Notes
- Requires GM SPS2 programming, transmission adaptive learn procedure, Dexron VI ATF, Tech2Win compatible
ABS / Brake Modules
Electronic Brake Control Module (EBCM)
- Notes
- GDS2 ABS/ESC init + bleed + SAS zero-point.
Wheel Speed Sensors (all four) 13512
- Part number
- 13512
- Notes
- Road test verify.
Other Modules (IPC, SAS)
Instrument Panel Cluster (IPC) 84578513
- Part number
- 84578513
- Cloning supported
- 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) 84911492
- Part number
- 84911492
- Cloning supported
- 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) 85138483
- Part number
- 85138483
- Cloning supported
- 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 required
- Yes
- Notes
- INTEGRATED (SCM clock spring)
Connectivity & Accessories
Surround View Calibration System CALIBRATION MAT J-49878
- Part number
- CALIBRATION MAT J-49878
- Notes
- Required tool for 4-camera surround view cal. Mat must be flat on ground around vehicle. GDS2 guided calibration sequence. All 4 cameras calibrated simultaneously.
Gateway / Security Modules
Central Gateway Module
- Manufacturer
- Renesas
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- D70F3585
- Notes
- Compatibility label: Chevrolet. Air conditioning Notes: Read/Write
Central Gateway Module
- Manufacturer
- Renesas
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- D70F3558
- Notes
- Compatibility label: Buick. BCM Notes: Read/Write
Central Gateway Module
- Manufacturer
- Various / Unlisted
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 1M12S
- Notes
- Compatibility label: CRUZE. BCM Notes: Years: 2015-
Central Gateway Module
- Manufacturer
- Various / Unlisted
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 1M12S
- Notes
- Compatibility label: Cavalier. BCM Notes: Years: 2015-
Central Gateway Module
- Manufacturer
- Various / Unlisted
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 1M12S
- Notes
- Compatibility label: Excelle. BCM Notes: Years: 2015-
Central Gateway Module
- Manufacturer
- Various / Unlisted
- Security
- VIN-locked (UDS)
- VIN locked
- Yes
- Coding required
- Yes
- Chip / MCU
- 1M12S
- Notes
- Compatibility label: SAIL. BCM Notes: Years: 2015-
ARCHITECTURE & CONNECTIVITY
Architecture & Connectivity
- Body Construction
- Mixed material; high-strength steel frame; aluminum hood/doors
- OBD Protocol
- ISO 15765-4 CAN (500 kbps HS-CAN)
- CAN Architecture
- GMLAN (HS-CAN + MS-CAN), Ethernet backbone on IOR/camera systems
- Infotainment
- Chevrolet Infotainment 3 Plus (8") or 3 Premium (13.4" High Country), Apple CarPlay + Android Auto
- OTA Capable
- No
- Infotainment Name
- Chevrolet Infotainment 3
- ECU/TCM Unlocking
- Contact us
- ECU/TCM Flashing
- Contact us
OPENPILOT / COMMA.AI
Openpilot Compatibility
Not Supported
Officially supported (openpilot master)
- Package
- Safety Package II
- Hardware
- Comma 3X + GM harness
- Harness
- GM Harness
Only 2020-21 supported; 2022+ facelift not yet ported.
FREQUENTLY ASKED QUESTIONS
FAQ
How much does ADAS calibration cost for a 2021 Chevrolet Silverado-1500?
ADAS calibration pricing for a 2021 Chevrolet Silverado-1500 depends on which of its 6 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 (optional). 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 Chevrolet Silverado-1500?
Yes. The 2021 Chevrolet Silverado-1500 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: 84396837. Mobile diagnosis and programming are available in DFW, and mail-in module service is available nationwide. 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 Chevrolet Silverado-1500?
After windshield replacement on a 2021 Chevrolet Silverado-1500, Forward Camera (Monocular), Forward Radar (77GHz), Surround View Camera System (optional), and HD Rear Camera 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 module service is available nationwide for eligible module work.
How long does a 2021 Chevrolet Silverado-1500 module service take?
Most 2021 Chevrolet Silverado-1500 onsite jobs are typically scheduled within 24-48 hours once vehicle readiness, access, and route timing are confirmed. This vehicle has roughly 28 programmable modules documented in our database (6 ECU, 3 BCM, 2 TCU, 2 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 service is available nationwide.
Do you cover the 2021 Chevrolet Silverado-1500 on-site, or is this mail-in only?
We run a mobile unit across the DFW Metroplex for on-vehicle work (ADAS calibration, post-repair recoding, and supported module work). Mail-in module service is available nationwide. Quote the work and we will confirm the active service path for the 2021 Chevrolet Silverado-1500. Do not ship a module unless support confirms next steps.
What kind of warranty do you offer on 2021 Chevrolet Silverado-1500 programming?
Every programming, cloning, and calibration job on the 2021 Chevrolet Silverado-1500 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.
Which modules on a 2021 Chevrolet Silverado-1500 can you actually service?
We program, clone, repair, or replace the full programmable-module stack on a 2021 Chevrolet Silverado-1500. For this vehicle our database documents:
- 6 engine control (ECU/PCM)
- 2 transmission control (TCU/TCM)
- 3 body control (BCM and related)
- 2 ABS / brake control (EBCM)
- 2 immobilizer / security
- 1 key & fob
- 3 instrument cluster (IPC)
- 1 steering angle sensor (SAS)
- 6 ADAS module
Infotainment on this platform: Chevrolet 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 Chevrolet Silverado-1500 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, L3B 2.7L TURBO, 12708
- BCM / Body Module Part Numbers
- 84252, 84, 23360
- TCU / TCM Part Numbers
- 24282
- SRS / Airbag Module Part Numbers
- 84396837, 84396838, 84743878, 84965378
- ABS / EBCM Part Numbers
- 84528
- Instrument Cluster (IPC) Part Numbers
- 84578513, 84911492, 85138483
- Transmission Control Module (TCM) Part Numbers
- 24282
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 Chevrolet Silverado 1500
These vehicles use one or more of the same replacement modules indexed for this vehicle.
Finish the repair
Need help finishing this repair?
Get onsite help in Dallas-Fort Worth. Ask about same-day availability or a one-time remote session for eligible non-VSP work.
GM SPS2 Explore one-time factory coding and programming. We confirm the software and procedure for your vehicle. Module programming & recovery Replacing a module or dealing with a failed programming attempt? Send the part numbers and fault scan for review. Onsite tools & equipment Bring in a technician or ask about hourly, daily and weekly rentals where licensing and equipment availability allow.