PRNDL Display
WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. 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 PRNDL displays blank if:
- The PCM detects a malfunction in the transmission range switch circuit.
- The IPC receives a class 2 message indicating that the park position and the column park switch indicate a position other than park.
- The IPC detects a loss of class 2 communications with the PCM.