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 |
|---|---|---|---|---|
| B+, BCM X4 Terminal 2 | B2615 00 | B2615 00 | - | - |
| B+, BCM X3 Terminal 2 | B1480 00 | B1480 00 | - | - |
| B+, BCM X2 Terminal 2 | B2652 00 | B2652 00 | - | - |
| 12 Volt Reference | B1395 00, B3600 03 | B3600 03 | - | - |
| Courtesy Lamp Supply Voltage | B2615 00 | 1 | 2 | - |
| Inadvertent Power Courtesy Lamp | B1480 00 | 6 | - | - |
| Courtesy Lamp On Switch Signal | 2 | 1 | 1* | - |
| Instrument Panel Lamps Dimmer Switch Signal | B3600 03 | B3600 03 | 9 | - |
| Interior Lamp Defeat Switch Signal | 1 | 10 | 10 | - |
| LED Backlight Dimming Control | B2610 00 | 7 | 8 | - |
| Instrument Panel Lamp Dimming Control | B2652 00 | 7 | 8 | - |
| Driver Door Open Switch Signal | 2 | 4 | 3 | - |
| Passenger Door Open Switch Signal | 2 | 5 | 5 | - |
| Ground - Courtesy Lamp | - | 1 | - | - |
| Ground - Driver Door Lock | - | 4 | - | - |
| Ground - Inadvertent Courtesy Lamps | - | 6 | - | - |
| Ground - Passenger Door Lock | - | 5 | - | - |
| * Internal damage to the switch may occur if shorted to B+ 1. Courtesy lamps are inoperative 2. Courtesy lamps are always On 3. Dome Lamp Switch Malfunction 4. Courtesy lamp control malfunction - driver door 5. Courtesy lamp control malfunction - passenger door 6. Inadvertent power courtesy lamps inoperative 7. Interior backlighting inoperative 8. Interior backlighting always On 9. Interior backlighting will not dim 10. Courtesy lamp defeat switch malfunction |
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