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.

    • Inspect the hoses for flexibility and no signs of bulging.
    • Inspect the hoses for cracks, cuts, kinks and areas of possible leaks.
    • Inspect the brackets, supports, ties and clamps.
    • Replace and adjust as needed.

Important: Do not brush the radiator fins. The radiator fins are necessary for good heat transfer. Brushing damages the fins and reduces heat transfer.

Clean the front face of the radiator annually.

    • Clean the front face of the condenser.
    • Remove bugs, leaves, etc. by blowing compressed air through the radiator.
        Blow the air from the rear toward the front. If compressed air is not available a water hose can be used to force water through the radiator.
        Use water only with the engine not running and cool.