Buick Century 1997-2000
Buick Regal 1997-2000
Chevrolet Lumina 1997-2000
Chevrolet Monte Carlo 1997-2000
Oldsmobile Cutlass Supreme 1997
Oldsmobile Intrigue 1998-2000
Pontiac Grand Prix 1997-2000
Use plain water to flush any corrosive materials (road salt, etc.) from the underbody. Take care to clean thoroughly any area where mud and other debris can collect. Check that any drain holes in the doors and rocker panels are open. Use a small screwdriver to clear them of any debris.