Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC2020SIERRA 2500 HD AT4, 6.6L ENG VIN YREPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESPROGRAMMING AND SETUP
2020 GMC Sierra 2500 HD AT4, 6.6L Eng VIN Y
Programming And Setup
2020 GMC Sierra 2500 HD AT4, 6.6L Eng VIN YSECTION Programming And Setup
- Diagnostic Information and Procedures
- Repair Instructions
- A11 Radio: Programming and Setup
- A22 Radio Controls: Programming and Setup
- A26 HVAC Controls: Programming and Setup
- B174W Frontview Camera - Windshield: Programming and Setup
- B218L Side Object Sensor Module - Left: Programming and Setup
- B218R Side Object Sensor Module - Right: Programming and Setup
- K9 Body Control Module: Programming and Setup
- K17 Electronic Brake Control Module: Programming and Setup
- K20 Engine Control Module: Programming and Setup
- K29F Seat Heating Control Module - Front: Programming and Setup
- K29R Seat Heating Control Module - Rear: Programming and Setup
- K32 Steering Wheel Heating Control Module: Programming and Setup
- K33 HVAC Control Module: Programming and Setup
- K34 Glow Plug Control Module: Programming and Setup
- K36 Inflatable Restraint Sensing and Diagnostic Module: Programming and Setup
- K36 Inflatable Restraint Sensing and Diagnostic Module: Configure New Module
- K38A Chassis Control Module - Auxiliary: Programming and Setup
- K40D Seat Memory Control Module - Driver: Programming and Setup
- K43 Power Steering Control Module: Programming and Setup
- K44 Power Take-off Control Module: Programming and Setup
- K56 Serial Data Gateway Module: Programming and Setup
- K60 Steering Column Lock Module: Programming and Setup
- K61 Sunroof Control Module: Programming and Setup
- K68 Trailer Lighting Control Module: Programming and Setup
- K69 Transfer Case Control Module: Programming and Setup (NQF)
- K69 Transfer Case Control Module: Programming and Setup (NQH)
- K71 Transmission Control Module: Programming and Setup ((10L1000 (MGM MGU))
- K73 Telematics Communication Interface Control Module: Programming and Setup
- K84 Keyless Entry Control Module: Programming and Setup
- K85 Passenger Presence Module: Programming and Setup
- K89 Immobilizer Control Module: Programming and Setup
- K115 Reductant Control Module: Programming and Setup
- K133 Trailer Brake Power Control Module: Programming and Setup
- K157 Video Processing Control Module: Programming and Setup
- K182 Parking Assist Control Module: Programming and Setup
- K194 Rear Gate Module: Programming and Setup
- K214 Trailer Tire Pressure Indicator Module: Programming and Setup
- P16 Instrument Cluster: Programming and Setup
- P29 Head-Up Display: Programming and Setup
- K71 Transmission Control Module or Q8 Control Solenoid Valve Assembly: Programming and Setup (6L80 (MYC) or 6L90 (MYD))
- T3 Audio Amplifier: Programming and Setup
- Fuel Pump Power Control Module Programming and Setup
- Service Programming System (SPS)
- Q77 Transmission Control Solenoid Valve Characterization Programming (10L1000 (MGM, MGU))
- Special Tools and Equipment
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.