Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- During the key ON test, the ECM detects high voltage on the generator turn on signal circuit for 5 seconds.
- During the RUN test, the ECM detects low voltage on the generator turn on signal circuit for 15 seconds.