Diagnostic Aids
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:
- A bent terminal
- A backed-out terminal
- A damaged terminal
- Poor terminal tension
- A chafed wire
- A broken wire inside the insulation
- When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.
- You may have to drive the vehicle in order to experience a condition.
- Vehicle accessories imposing a large load on the battery circuit could also cause this DTC to set.
- Loose or corroded battery cables could allow this DTC to set.
- An internal TCM failure, due to a burn up circuit trace, could allow this DTC to set.
- Vehicle charging system failure may cause this DTC to set under certain circumstances.
- A defective vehicle battery may induce this DTC.
- Running the engine with a battery charger attached may cause this DTC to set.