GMC Sierra 2500 HD Problem Report

GMC Sierra 2500 HD Popping Noise From Muffler Heat Shield

(9 reports)

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.

RATTELING NOISE ON EXCELLERATION. WAS FIXED BY PUTTING A LARGE HOSE CLAMP AROUND THE MUFFLER -
my muffler started rattling when I let off the gas -
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