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Q: how to tell if fan clutch needs replaced on 2005 GMC Savana 2500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
air condition is not as cool as it was last year
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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The fan clutch on a truck driven of the engine either fails and causes the engine to run hot (the gel in the hub leaks out and no longer is able to expand and "lock up" to cool the engine the other way it fails is it "lock up" and fails to release causing a load noise all the time. Its function does not affect a/c output.Poor a/c operation is normally low refrigerant charge.
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