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Ask Your Question2003 GMC Yukon Denali
Question: A/C and overheating
Question
I have an 2003 Denali which has had a new compressor, rec./dryer, clutch fan, freon recharge, new water pump, and coolant flush. Still continue to have problem with overheating with A/C running after 15 min. of stop and go traffic. After brief idling air becomes less cool and progressively becomes worse the longer truck is in (stop and go traffic) situation. As soon as truck starts moving again air cools down and thermostat returns to normal. Any help would be appreciated.
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Best Answer
Bret Bodas June 10, 2009, 16:35Reply
MasterSounds like the airflow through the condenser/radiator is an issue. Make sure the radiator fans are working properly and that the condenser and radiator are not plugged with debris.
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Answer #2
ILANED December 25, 2009, 15:44Reply
Rookieif you live in area with 80 -to 90 degree and you used your AC you need to Adjust your termostart to 160 degree and used half and half Water and Coolant anti frezze , Some vehicle it overheat .i was in Las Vegas few time, Drive from La to Vegas i saw lots of SUV on the side of the road Over heated. i check all theirs Plate number they are not from Vegas. try this i live in Acnhorage alaska and dont have this Problem, i have a Jeep Grand cherokee before .its overheated every summer i change the termostart to 160 during summer time,and i put the 180 back during the winter time. i hope this one help .nothing to loose if you try it.
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