2002 Chevrolet Suburban 2500 Q&A
2002 Chevrolet Suburban 2500 Question: What is the buzz/hum in my stock exhaust?
Exhaust shield loose maybe? Tap along exhaust pipe front to back with a rubber hammer, listen for noise. - pushrod
Heat shield or hanger may have worked its way loose. If you can pound on the exhaust and get it to rattle inside then you have to replace a couple of items... - Hal...