Reset service light indicator, engine oil life Cadillac Allante, year 1989-1993 reset instructions:

1989-1993

Turn the ignition to run (one position before starting engine).
Press the range button until the OIL LIFE INDEX is displayed.
Press and hold the AVERAGE SPEED and RANGE buttons until the display resets to 100.
Turn the ignition to off and start engine to verify the indicator has been reset.