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.Google+
Car Problem Reports
Chevrolet Tahoe Popping Noise From Muffler Heat Shield
Chevrolet Tahoe Problem
Exhaust & Emissions Affected: V8
Average Mileage: 244,644 mi (46,000 mi - 2,400,450 mi)
loud popping noise voming from muffler
Visitor, 2000 Chevrolet Tahoe, 79,000 mi
Same as above, inconsistent noise underneath.
Mine is doing the same thing. The heat shield is cracked and making terrible rattling noises.
Visitor, 2004 Chevrolet Tahoe, 100,000 mi
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!
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.
Visitor, 2005 Chevrolet Tahoe, 50,000 mi
Occasionally loud noise heard at low speed. Very annoying.
Visitor, 2004 Chevrolet Tahoe
Popping noise on my 04 GMC Yukon after turning it off. Seems to be coming from under, near the rear wheels.
When I turn off the car there is a popping noise for quite so time.
Visitor, 2004 Chevrolet Tahoe, 82,000 mi
loose heatshield and rattle