Diagnostic Fault Information
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. 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 |
|---|---|---|---|---|
| DRL Ambient Light Sensor Signal | B2645 03 | B2645 07 | B2645 07 | - |
| DRL Relay Control | 1 | 1 | B2600 00 | - |
| Left Low Beam Headlamp Control | 2 | 2 | 2 | - |
| Right Low Beam Headlamp Control | 2 | 2 | 2 | - |
| DRL Ambient Light Sensor Low Reference | - | B2645 07 | - | - |
| Right Headlamp Low Beam Ground | - | 2 | - | - |
| Right Headlamp Low Beam Ground | - | 2 | - | - |
| 1. Daytime Running Lamps (DRL) Malfunction 2. Headlamps Malfunction - Low Beam |
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