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 |
|---|---|---|---|---|
| HVAC Controls Switch Assembly B+ | 2 | 2 | - | - |
| Rear Defogger Relay B+ | 2 | 2 | - | - |
| Rear Defogger Relay Control | 2 | 2 | 1 | - |
| Left Rear Window Defogger Grid Control | 2 | 3 | 1 | - |
| Right Rear Window Defogger Grid Control | 2 | 3 | 1 | - |
| Rear Defogger Relay Ground | - | 2 | - | - |
| Left Rear Window Defogger Grid Ground | - | 3 | - | - |
| Right Rear Window Defogger Grid Ground | - | 3 | - | - |
| HVAC Controls Switch Assembly Ground | - | 2 | - | - |
| 1. Rear defogger grids always On 2. Both rear defogger grids inoperative 3. Single rear defogger grid inoperative |
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