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

turn ac off and it cools down

by in Dixmont, ME on August 22, 2012
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2 answers
ANSWER by , August 22, 2012
See if there is an electric booster fan that may not working.
ANSWER by , August 22, 2012
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.