PRND321 Display
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The IPC displays the selected gear position as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the gear position. The PRND321 display blanks if:
- The PCM detects a malfunction in the transmission range switch circuit.
- The IPC detects a loss of class 2 communications with the PCM.