GMC Troubleshooting Questions? Ask a Mechanic for Answers
the ac works fine ?
if nothing is hitting the belt and the pulley then what usually breaks these belts is an internal compressor failure causing it to lock up and bind and breaking the belt
if nothing is hitting the belt the compressor will have to be changed to correct this issue i am sorry to say as this is a very common issue on these trucks
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how are you making out ?