Conditions for Running the DTC
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Source voltage is 8.7-16.5 volts.
- The HVAC control module receives a RUN power mode message from the BCM over the class 2 serial data circuit.