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HOMESERVICE MANUALSGMC2020SIERRA 2500 HD AT4, 6.6L ENG VIN YREPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESPROGRAMMING AND SETUPDIAGNOSTIC INFORMATION AND PROCEDURESCONTROL MODULE REFERENCES
2020 GMC Sierra 2500 HD AT4, 6.6L Eng VIN Y

Control Module References

2020 GMC Sierra 2500 HD AT4, 6.6L Eng VIN YSECTION Control Module References

Reference Information

Code Control Module/Scan Tool Information Schematic Repair Instruction Programming and Setup
A11 A11 Radio: Scan Tool Information Radio/Navigation System Wiring Schematics (IOR) , or Radio/Navigation System Wiring Schematics (IOS/IOT) Radio Replacement A11 Radio: Programming and Setup 
A22 A22 Radio Controls: Scan Tool Information Radio/Navigation System Wiring Schematics (IOR) , or Radio/Navigation System Wiring Schematics (IOS/IOT) Radio Control Assembly Replacement A22 Radio Controls: Programming and Setup 
B174W B174W Frontview Camera: Scan Tool Information Driver Assistance Systems Wiring Schematics Front View Camera Replacement B174W Frontview Camera - Windshield: Programming and Setup 
B218L/R Driver Assistance Systems Wiring Schematics Side Object Sensing Alert Module Replacement
K9 K9 Body Control Module: Scan Tool Information Body Control System Wiring Schematics Body Control Module Replacement K9 Body Control Module: Programming and Setup 
K17 K17 Electronic Brake Control Module: Scan Tool Information Antilock Brake System Wiring Schematics Electronic Brake Control Module Replacement K17 Electronic Brake Control Module: Programming and Setup 
K20 K20 Engine Control Module: Scan Tool Information (L5P) , or K20 Engine Control Module: Scan Tool Information (Except Diesel) K20 Engine Control Module: Programming and Setup 
K29 Seat Heating Control Module Heated/Cooled Seat Wiring Schematics
K32 Steering Heating Control Module Steering Wheel Wiring Schematics Heated Steering Wheel Module Replacement K32 Steering Wheel Heating Control Module: Programming and Setup 
K33 K33 HVAC Control Module: Scan Tool Information K33 HVAC Control Module: Programming and Setup 
K34 Glow Plug Control Module Scan Tool Information Engine Controls Wiring Schematics (L5P) - 6.6L (L5P) Diesel engine Glow Plug Control Module Replacement K34 Glow Plug Control Module: Programming and Setup 
K36 K36 Inflatable Restraint Sensing and Diagnostic Module: Scan Tool Information SIR Wiring Schematics Airbag Sensing and Diagnostic Module Replacement K36 Inflatable Restraint Sensing and Diagnostic Module: Programming and Setup 
K38A K38A Chassis Control Module - Auxiliary: Scan Tool Information Trailer Brake Control Wiring Schematics Auxiliary Chassis Control Module Replacement - Trailer Brake (Crew Cab) , or Auxiliary Chassis Control Module Replacement - Trailer Brake (Chassis Cab) K38A Chassis Control Module - Auxiliary: Programming and Setup 
K40 K40D Seat Memory Control Module - Driver: Scan Tool Information Driver Seat Wiring Schematics Driver Seat Adjuster Memory Module Replacement K40D Seat Memory Control Module - Driver: Programming and Setup 
K43 K43 Power Steering Control Module: Scan Tool Information Power Steering Wiring Schematics Electronic Power Steering Motor Control Module Replacement K43 Power Steering Control Module: Programming and Setup 
K44 K44 Power Take-off Control Module: Scan Tool Information Power Take-Off (PTO) Wiring Schematics Engine Speed Power Take-Off Control Module Replacement K44 Power Take-off Control Module: Programming and Setup 
K56 Serial Data Gateway Module Data Communication Wiring Schematics Serial Data Gateway Module Replacement K56 Serial Data Gateway Module: Programming and Setup 
K60 K60 Steering Column Lock Module: Scan Tool Information Column Lock Wiring Schematics Column Lock Module Replacement K60 Steering Column Lock Module: Programming and Setup 
K68 K68 Trailer Lighting Control Module: Scan Tool Information Trailer Connector/Provision Wiring Schematics Trailer Lamp Control Module Replacement K68 Trailer Lighting Control Module: Programming and Setup 
K69 K69 Transfer Case Control Module: Scan Tool Information K69 Transfer Case Control Module: Programming and Setup (NQF) , or K69 Transfer Case Control Module: Programming and Setup (NQH) 
K71/Q8 K71 Transmission Control Module: Scan Tool Information (6L80 (MYC) or 6L90 (MYD)) , or K71 Transmission Control Module: Scan Tool Information (10L1000 (MGM, MGU)) , or K71 Transmission Control Module: Scan Tool Information (6L80 (MYC) or 6L90 (MYD)) , or K71 Transmission Control Module: Scan Tool Information (10L1000 (MGM, MGU))
K73 K73 Telematics Communication Interface Control Module: Scan Tool Information OnStar/Telematics Wiring Schematics (UE1) Communication Interface Module Replacement K73 Telematics Communication Interface Control Module: Programming and Setup 
K89 Immobilizer Control Module Immobilizer Wiring Schematics Theft Deterrent Module Replacement (without BTM) , or Theft Deterrent Module Replacement (with BTM and Front Floor Console) , or Theft Deterrent Module Replacement (with BTM and Front Center Seat) K89 Immobilizer Control Module: Programming and Setup 
K111 Fuel Pump Power Control Module Scan Tool Information (AKA: Fuel Pump Driver Control Module) Fuel Pump Power Control Module Programming and Setup 
(AKA: Fuel Pump Driver Control Module)
K115 Reductant Control Module Engine Controls Wiring Schematics (L5P) - 6.6L (L5P) Diesel engine Emission Reduction Fluid Controller Replacement (Crew Cab) , or Emission Reduction Fluid Controller Replacement (Chassis Cab) K115 Reductant Control Module: Programming and Setup 
K133 Trailer Brake Power Control Module Trailer Brake Control Wiring Schematics Trailer Brake Control Module Replacement (Chassis Cab) , or Trailer Brake Control Module Replacement (Crew Cab) K133 Trailer Brake Power Control Module: Programming and Setup 
K157 Video Processing Control Module Image Display Camera Wiring Schematics Video Processing Module Replacement K157 Video Processing Control Module: Programming and Setup 
K182 K182 Parking Assist Control Module: Scan Tool Information Parking Assistance Systems Wiring Schematics Parking Assist Control Module Replacement (Crew Cab, Double Cab) , or Parking Assist Control Module Replacement (Regular Cab) K182 Parking Assist Control Module: Programming and Setup 
K194 K194 Rear Gate Module Scan Tool Information Endgate Wiring Schematics Accessory and Liftgate Control Module Replacement K194 Rear Gate Module: Programming and Setup 
K214 K214 Trailer Tire Pressure Indicator Module: Scan Tool Information Tire Pressure Monitoring System Wiring Schematics Trailer Tire Pressure Indicator Module Replacement K214 Trailer Tire Pressure Indicator Module: Programming and Setup 
P16 P16 Instrument Cluster: Scan Tool Information Instrument Cluster Wiring Schematics Instrument Cluster Replacement P16 Instrument Cluster: Programming and Setup 
P29 Head-Up Display Head-Up Display Wiring Schematics (UV6) Head-Up Display Replacement P29 Head-Up Display: Programming and Setup 
T3 T3 Audio Amplifier: Scan Tool Information Radio/Navigation System Wiring Schematics (IOR) , or Radio/Navigation System Wiring Schematics (IOS/IOT) Radio Speaker Amplifier Replacement T3 Audio Amplifier: Programming and Setup 
RENDER: 1.0x

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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.