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Home >> Hummer >> 2004 >> H2 V8-6.0L >> Repair and Diagnosis >> Transmission and Drivetrain >> Transmission Control Systems >> Lamps and Indicators - Transmission and Drivetrain >> Lamps and Indicators - A/T >> Shift Indicator - A/T >> Description and Operation

Shift Indicator - A/T: Description and Operation

PRNDL DISPLAY

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 display blanks if:
- The PCM detects a malfunction in the transmission range switch circuit.
- The IPC receives a class 2 message indicating the park position and the column park switch indicates a position other than park, open input.
- The IPC detects a loss of class 2 communications with the PCM.