Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Perform a visual inspection for loose or poor connections at all related components. Refer to TESTING WIRING SYSTEMS FOR INTERMITTENT & POOR CONNECTIONS in Wiring Systems.
- A short to ground in the following circuits will cause the TBC 2 A fuse to open.
- The instrument panel lamps dimming control.
- Battery positive voltage from the instrument panel fuse block TBC 2 A fuse.
- An open in the TBC 2 A fuse will cause the BCM to set the following DTC:
- B0951
- B2610
- B2625