Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. 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 FOR INTERMITTENT AND POOR CONNECTIONS .
- A short to ground in the following circuits will cause the TBC 3 fuse to open.
- The backlight lamps control.
- The instrument panel lamps dimming control.
- The LED dimming signal.
- Battery positive voltage from the underhood fuse block TBC 3 fuse.
- An open in the TBC 3 fuse will cause the BCM to set the following DTC:
- B0951
- B2610
- B2625