GM Service Manual Online
For 1990-2009 cars only

Deposits of foreign material that are left on the painted surfaces of the vehicle may damage the finish. These include the following deposits:

    • Calcium chloride and other salts
    • Ice melting agents
    • Road oil and tar
    • Tree sap
    • Bird droppings
    • Chemicals from industrial chimneys
    • Other foreign matter

In order to clean these deposits, use cleaners that are designed for painted surfaces.