Malibu V6-191 3.1L VIN M SFI (1997)
Transmission Shift Position Indicator Lamp: Description and Operation
The Powertrain Control Module (PCM) reads the Transaxle Range Switch and transmits the selected gear position over Class 2. The Body Function
Controller (BFC) retransmits this information to the Instrument Cluster via the Serial Peripheral Interface (SPI) data link. The Instrument Cluster must
turn on the correct indicator and perform a scrolling function.
