Diagnostic Fault Information
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
DTC B3920 or B3921
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| Driver Seat Front Vertical Motor Down Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Front Vertical Motor Up Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Rear Vertical Motor Down Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Rear Vertical Motor Up Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Horizontal Motor Forward Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Horizontal Motor Rearward Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Recline Motor Forward Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Recline Motor Rearward Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Lumbar Motor Down Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Lumbar Motor Forward Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Lumbar Motor Up Control | B3920 02 | 1 | B3920 01 | - |
| Driver Seat Lumbar Motor Rearward Control | B3920 02 | 1 | B3920 01 | - |
| Adjustable Pedal Motor Forward Down Control | B3920 02 | 1 | B3920 01 | - |
| Adjustable Pedal Motor Rearward Control | B3920 02 | 1 | B3920 01 | - |
| 1. Power seat motor inoperative | ||||