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GMC Sierra 1500 Hybrid Problems

Popping Noise From Muffler Heat Shield on GMC Sierra 1500 Hybrid

Problem Description and Possible Solution

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.

(1 person reported this problem)

GMC Sierra 1500 Hybrid Vehicles With This Problem

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Average mileage: (–)
1 model year affected: 2007
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Brake problem? Or maybe a faulty head gasket cylinder?
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