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 |
|---|---|---|---|---|
| Dome Lamp Switch Signal | 1 | 3 | - | - |
| Interior Lamp Defeat Switch Signal | 2 | 4 | - | - |
| Door Open Switch Signal | 1 | - | - | |
| Courtesy Lamp Control | B2615 | 2 | 1 | - |
| 1. Courtesy lamps always on 2. Courtesy lamps inoperative 3. Courtesy lamps inoperative from dome lamp switch 4. Manual defeat switch inoperative 3. Courtesy lamps not on with door open |
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