Diagnostic Aids
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.
The following conditions may cause the DTC to set:
- A poor connection at the inoperative module
- An intermittent open on high speed GMLAN
- An open voltage or ground circuit to a module
- An internal module malfunction