GM Service Manual Online
For 1990-2009 cars only

Caution: NEVER spray water on a hot heat exchanger. The resulting steam could cause personal injury.

Notice: The heat exchanger fins are necessary for good heat transfer. Do not brush the fins. This may cause damage to the fins, reducing heat transfer.

       Important: Remove bugs, leaves, dirt and other debris by blowing compressed air through the engine side of the radiator.

    • Some conditions may require the use of warm water and a mild detergent.
    • Clean the charge air cooler fins.
    • Clean between the charge air cooler and condenser.
    • Straighten any damaged cooling fins.