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.
Average mileage: 113,400 (39,000–245,000)
Exhaust & Emissions affected: V8
18 people reported this problem
Viewing 1 - 6 of 6 comments
Mechanic heated the shield, bent it so it would not touch and this cured the problem.
there is a raddle
Removed catalytic converters several years ago. Around 240000 miles heat shield started rattling. Thinking about just taking it off.
awful vibration noise coming from underneath vehicle toward the rear.
This happened to me as soon as i got the truck, took the shield off, cut and trimmed, and used green lochtite on the bolts, no more noise.
popping, or "oil can" pop while idling