GM Service Manual Online
For 1990-2009 cars only

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, 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.

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

Important: It is important that the front of the radiator is kept clear for proper cooling.

For other maintenance recommendations and system capacities, refer to the following procedures:

    •  Approximate Fluid Capacities in Maintenance and Lubrication
    •  Periodic Maintenance Inspection in Maintenance and Lubrication