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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> Heated/Cooled Seats Inoperative (Cadillac, KB6) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, observe the HVAC control panel while pressing and releasing the appropriate heated or cooled seat switch. The switch symbol should be displayed on the control panel.
    • If the symbol is not displayed, replace the HVAC control module.
  2. Engine running, operate the driver and passenger heated and cooled seats through the modes of operation listed below. The seat should operate in all three modes.
    • Seat back and cushion heat mode
    • Back only heat mode
    • Cool mode
      • If both, the driver and passenger heated/cool seats are inoperative, refer to Both Driver and Passenger Heated/Cooled Seats are Inoperative.
      • If just the driver heated/cooled seat is inoperative, refer to Only One Heated/Cooled Seat is Inoperative.
      • If just the passenger heated/cooled seat is inoperative, refer to Only One Heated/Cooled Seat is Inoperative.
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