The IPC illuminates the upshift indicator when the PCM determines that the vehicle should be shifted to the next higher gear or the IPC receives a class 2 message from the PCM requesting illumination. The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
Home/Pontiac/Sunfire/Pontiac Sunfire I (1995-2005)/Repair manual/Theory & Operation/Up-Shift Indicator (M/t)
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