GM Service Manual Online
For 1990-2009 cars only
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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.
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  • Clean the A/C condenser fins.
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  • Clean between the A/C condenser and radiator.
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  • Clean the radiator cooling fins.
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  • Straighten any damaged cooling fins.