GM Service Manual Online
For 1990-2009 cars only

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

Important: Keep the front of the radiator clear for proper cooling.

    • Inspect the condition of all hoses and clamps:
       - 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 the hoses and clamps as needed.
    • Clean the front face of the radiator annually.
       - Clean the front face of the condenser.
       - Remove bugs, leaves, and other foreign material by blowing compressed air through the radiator.
       - Blow the air from the rear toward the front. If compressed air is not available, use a water hose in order to force water through the radiator.
       - Use water only with the engine not running and cool.