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 A/C condenser fins.
    • Clean between the A/C condenser and radiator.
    • Clean the radiator cooling fins.
    • Straighten any damaged cooling fins.
    • Vehicles equipped with a diesel engine, clean between the charged air cooler and the A/C condenser also.
        Removal of the charge air cooler may be necessary to clean the fins. Refer to Charged Air Cooler Replacement in Engine Mechanical - 6.6 L.