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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1143 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> Heated Seat Inoperative >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool HVAC Driver Heated Seat Sw. parameter while pressing the driver HEATED seat switch. The readings should change between Inactive and Active.
    • If not the specified value, replace the HVAC Control Module.
  2. If the scan tool displays normal, there are no DTCs set, and the driver heated seat is inoperative, replace the MSM.
  3. Observe the scan tool HVAC Psgr. Heated Seat Sw. parameter while pressing the passenger HEATED seat switch. The readings should change between Inactive and Active.
    • If not the specified value, replace the HVAC Control Module.
  4. If the scan tool displays normal, there are no DTCs set, and the passenger heated seat is inoperative, replace the MSM.
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