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Diagnostic Fault Information

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.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Ambient Light Sensor Signal B2645 03 B2645 07 B2645 07 -
DRL Relay Control 1 2 B2600 00 -
Low Beam Headlamp Control 4 4 3 -
Low Beam Headlamp Ground - 4 - -
Ambient Light Sensor Ground - B2645 07 - -
1. The daytime running lamps are always on.
2. The daytime running lamps are inoperative.
3. The low beam headlamps are always on.
4. The low beam headlamps are inoperative.
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