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HOMESERVICE MANUALSGMC2016SIERRA 3500 HD SLE, 4D CAB CHASSIS, 6.6L ENG VIN 8, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASOBJECT DETECTION SYSTEM AND PEDESTRIAN PROTECTION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESSEAT HAPTIC SIGNAL MOTOR MALFUNCTIONCIRCUIT/SYSTEM TESTING
2016 GMC Sierra 3500 HD SLE, 4D Cab Chassis, 6.6L Eng VIN 8, 4WD

Circuit/System Testing

2016 GMC Sierra 3500 HD SLE, 4D Cab Chassis, 6.6L Eng VIN 8, 4WDSECTION Circuit/System Testing
  1. Ignition OFF, disconnect the X5 harness connector at the K40D Seat Memory Control Module - Driver, ignition ON.
  2. Test for less than 1 V between the appropriate control circuit terminal listed below and ground:
    • P45LR Seat Haptic Movement Motor - Driver Left Rear terminal 5
    • P45RR Seat Haptic Movement Motor - Driver Right Rear terminal 4
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • If less than 1 V 
  3. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.
  4. Test for 27-51 Ω between the appropriate control circuit terminal listed below and ground:
    • P45LR Seat Haptic Movement Motor - Driver Left Rear terminal 5
    • P45RR Seat Haptic Movement Motor - Driver Right Rear terminal 4
    • If less than 27 Ω 

      Test or replace the appropriate P45 Seat Haptic Movement Motor - Driver.

    • If greater than 51 Ω 
    1. Verify the circuit ground connection is clean and secure.
      • If the ground connector is not clean or secure, repair as necessary.
      • If the circuit ground connection is clean and secure
    2. Replace the appropriate P45 Seat Haptic Movement Motor - Driver.
    • If between 27-51 Ω 
  5. Install a 3 A fused jumper wire between the appropriate control circuit terminal listed below and B+.
    • P45LR Seat Haptic Movement Motor - Driver Left Rear terminal 5
    • P45RR Seat Haptic Movement Motor - Driver Right Rear terminal 4
  6. Verify the appropriate P45 Seat Haptic Movement Motor - Driver is active.
    • If the P45 Seat Haptic Movement Motor - Driver is not active 

      Replace the appropriate P45 Seat Haptic Movement Motor - Driver.

    • If the P45 Seat Haptic Movement Motor - Driver is active 
  7. Ignition OFF, connect the harness connector at the K40 Seat Memory Control Module, ignition ON.
  8. Verify the P45LR Seat Haptic Movement Motor - Driver Left Rear turns ON and OFF when commanding the Driver Seat Cushion Left Rear Haptic Movement On and Off with a scan tool.
    • If the motor does not turn ON and OFF 

      Replace the K40 Seat Memory Control Module.

    • If the motor turns ON and OFF 
  9. Verify the P45RR Seat Haptic Movement Motor - Driver Right Rear turns on and off when commanding the Driver Seat Cushion Right Rear Haptic Movement On and Off with a scan tool.
    • If the motor does not turn ON and OFF 

      Replace the K40 Seat Memory Control Module.

    • If the motor turns ON and OFF 
  10. All OK.
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.