Regal V6-3100 3.1L VIN M SFI (1996)
Timing Marks and Indicators: Locations
The ignition timing is completely controlled by the Powertrain Control Module (PCM). No timing reference marks are provided.
Buick Workshop Service and Repair Manuals
Spark Plug Wire <--> [Ignition Cable] >
< Number 1 Cylinder Location
Page 1
