Two problems related to manifold/header/muffler/tail pipe have been reported for the 2007 Chevrolet Silverado. The most recently reported issues are listed below.
Defective exhaust manifold bolts. The bolt heads are breaking off of my 2007 chevy Silverado crew cab truck. This is a well maintained lightly used truck I use for work. After discovering the problem, I went to the internet to search solutions on this problem and that's how I found out that this is a very big problem with this truck engine. There is no tsp on this or a recall, but there should be, engines affected are all v-8's from 4. 8l, 5. 3l, and 6. 0l. Very expensive repair that shouldn't have happened in the first place.
Multiple broken exhaust manifold bolts.