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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1323 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> Heated Seat Inoperative (Factory Installed) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the appropriate scan tool Driver Door Switch or Passenger Door Switch parameters listed below while pressing and releasing the appropriate switch. The readings should change between Inactive and Active.
    • Seat Back Heat Mode Sw.
    • Seat Heat Mode Sw.
    • If not the specified values, refer to the Heated Seat Switch  component test. If the heated seat switch tests normal, replace the appropriate door lock/window switch.
  2. If all scan tool parameters test normal and there are no DTCs set, replace the MSM.
  3. If all heated seat functions operate normal and the heated seat switch indicators do not illuminate, refer to the Heated Seat Switch Indicators  component test.
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