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: 117,919 (46,000–190,000)
Exhaust & Emissions affected: V8
37 people reported this problem
Viewing 1 - 14 of 14 comments
Popping noise on my 04 GMC Yukon after turning it off. Seems to be coming from under, near the rear wheels.
loud rattle noise from under the center of the car. when in drive. Seems to lessen when in park. Sounds like hell. Mine became loose from a weld - re-welded and good to go. LOVE MY TAHOE!
it has not been fixed. Have continued to drive with loud tattle
loud popping noise voming from muffler
Same as above, inconsistent noise underneath.
Mine is doing the same thing. The heat shield is cracked and making terrible rattling noises.
My heat shield also makes noise mostly rattles but does make the popping sound...
Intermittent rattling of the muffler. Took it to a service location numerous times only to have the noise disappear when they tried it. Finally, an adept technician warmed the vehicle and drove it around the block a few times and heard it. Seems that temperature and speed were a factor. They welded it once for me, but it didn't hold for long. Ended up replacing with a magna flow muffler system.
Occasionally loud noise heard at low speed. Very annoying.
When I turn off the car there is a popping noise for quite so time.
loose heatshield and rattle
Vibration noise at low speed; especially when before the car is warmed up
I My 2005 Tahoe's also rattles as I accelerate.I notice that while under the vehicle, the shield is very flimsy(prone to vibration right where the exhaust sensor is.I have thought about wedging some exhaust wrap between the body and shield.
rattling noise from cat or heat shield...not sure....putting pressure on the cat with a bar stops the noise.