Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. 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 |
|---|---|---|---|---|
| Headlamp LO/HID Relay B+ | 1 | 1 | - | - |
| High Beam Relay B+ | 2 | 2 | - | - |
| Headlamp Flash to Pass Signal | 4 | 4 | 4 | - |
| Headlamp Dimmer Switch Signal | 4 | 4 | 4 | - |
| Headlamp Low Beam Control | 1 | 1 | 1 | - |
| Headlamp Low Beam Relay Control | 1 | 1 | B2575 00 | - |
| Headlamp Switch Off Control | B257A 00 | 3 | 3 | - |
| Headlamp Switch On Control | B257A 00 | 3 | 3 | - |
| Headlamp High Beam Control | 2 | 2 | 2 | - |
| Headlamp High Beam Relay Control | 2 | 2 | B2580 00 | - |
| Park Lamp Switch On Control | B257A 00 | B257A 00 | 3 | - |
| Headlamp Switch Ground | - | 2 | - | - |
| Turn Signal/Multifunction Switch Malfunction | - | 4 | - | - |
| 1. Headlamp Malfunction - Low Beam 2. Headlamp Malfunction - High Beam 3. Headlamp Switch Malfunction 4. Turn Signal/Multifunction Switch Malfunction |
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