GMC Yukon Problem Report

GMC Yukon Popping Noise From Muffler Heat Shield

(13 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.

Loud rattling noise coming from under the rear of the car. Have not had it diagnosed yet, but souinds like this may be the cause. The noise is not constant. Usually at slow speeds. Independent of whether the car is warm or not. -
Heat shield cracked. Had a muffler shop to weld it. But, after about 10k miles it has cracked again. -
upon accelaration, I hear the vibration of the muffler. -
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