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 | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
| B+ Lumbar Switch | 2 | 1 | 1 | - | - |
| Lumbar Down Switch Signal | 2 | 1 | 1 | - | - |
| Lumbar Up Switch Signal | 2 | 1 | 1 | - | - |
| Lumbar Forward Switch Signal | 2 | 1 | 1 | - | - |
| Lumbar Rearward Switch Signal | 2 | 1 | 1 | - | - |
| Driver Seat Lumbar Motor Forward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
| Driver Seat Lumbar Motor Rearward Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1850 5A |
| Driver Seat Lumbar Motor Down Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1860 5A |
| Driver Seat Lumbar Motor Up Control | B3920 02 | B1335 00, B1335 0B | 1 | B3920 01 | B1335 42, B1335 4B, B1860 5A |
| 1. Lumbar support inoperative 2. Scan Tool Does Not Communicate with Low Speed GMLAN Device |
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