Problem overview
The muffler heat shield may become loose on the muffler causing a rattle or popping noise. Our technicians tell us there is a kit available from GM to correct this problem.
11 people reported this problem
2 commentsGMC Sierra 2500 HD vehicles with this problem
7 model years affected
Average mileage: 75,750 miles
(53,000 - 98,500)
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