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Q:

the engine heats up when ideling with ac on on 2004 GMC Savana 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
turn ac off and it cools down
(2) Answers
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Need to check fan clutch operation. The clutch controls fan blade speed. If the fan cluch has failed it will cause the symtom you discribe.