GM Service Manual Online
For 1990-2009 cars only

Exhaust System Inspection for GMC Truck Yukon Denali 2003

Inspect the complete exhaust system. Inspect the body near the exhaust system. Look for broken, damaged, missing, or out-of-position parts as well as open seams, holes, loose connections, or other conditions which could cause a heat build-up in the floor pan or could let exhaust fumes into the vehicle. See Engine Exhaust .