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 Silverado 1500 HD Popping Noise From Muffler Heat Shield
Chevrolet Silverado 1500 HD Problem
Average Mileage: 71,077 mi (63,233 mi - 78,000 mi)
Visitor, 2008 Chevrolet Silverado 1500 HD, 63,233 mi
rattiling nosie where muffler is
I am having a rattiling noise close to where the muffler is? anybody know what that might be.