One problem related to manifold/header/muffler/tail pipe has been reported for the 2014 Chevrolet Express 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Chevrolet Express 1500 based on all problems reported for the 2014 Express 1500.
Exhaust manifold bolts are breaking causing exhaust fumes to leak in to engine compartment. Fumes then enter the cabin. First bolt broke at 70,000 miles and the. Another at 120,000 miles.