GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, my name is ***** ***** is usually caused by an externally blocked radiator, dirt and debris collect between the radiator and the A/C condensor and restrict the flow of air through it, this is more prevelant when idling, have you removed the radiator and seen if there is alot of debris in it? It is not visible with the radiator installed?
if you dont let it idle d , it will be fine, the cost to remove the radiaor and blow it out is about 80 dollars, but dont let it overheat,Tim
driving in traffic will make it overheat, so it is not a good idea, this needs to be fixed before you should do any intown driving,Tim