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.
- Ignition ON, observe the appropriate scan tool Heated Seat Module parameter listed below while pressing and releasing the heated seat back and cushion switch. The readings should change between Off and Back & Cushion.
- Driver Seat HVC Mode
- Passenger Seat HVC Mode
- If not the specified value, refer to Heated Seat Switch Malfunction .
- Ignition ON, observe the appropriate scan tool Heated Seat Module parameter listed below while pressing and releasing the heated seat back only switch. The readings should change between Off and Back Only.
- Driver Seat HVC Mode
- Passenger Seat HVC Mode
- If not the specified value, refer to Heated Seat Switch Malfunction .
- If all heated seat switch functions operate OK, but, one or more of the heated seat switch indicators is inoperative or always ON, refer to Heated Seat Switch Indicator Malfunction .
- If all scan tool parameters test normal and there are no DTCs set, replace the HSM.