Diagnostic Aids
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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.
- This DTC could indicate a hydraulic leak path exhausting pressure from the reverse pressure switch.
- An inactive DTC P0875 set in combination with DTC P0872 often indicates that an internal PNP switch failure occurred on a previous drive cycle. If this combination returns after clearing the DTCs, replacement of the PNP switch may be necessary.
- The intent of this code is to detect discrepancies between the range selected at the PNP and the actual position of the manual selector valve.