Sierra 1500

Rattling Noise From AC Belt Tensioner on GMC Sierra 1500

Problem Description and Possible Solution

A rattling noise may develop from the AC belt tensioner. This can be caused by an internal fault with the AC compressor, AC performance may also be diminished when this occurs. Our technicians tell us that replacing the ac compressor will commonly correct this concern.


Problem Data
RepairPal Verified
Average mileage: 88,972 (14,890–190,000)
6 model years affected: 1999, 2000, 2001, 2002, more2007, 2015
12 people reported this problem
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engine running fine but now has started making rattling noise like something is loose. The noise is coming from the front of the engine where serpentine belt and fan is