Four problems related to manifold/header/muffler/tail pipe have been reported for the 2003 Chevrolet Trailblazer. The most recently reported issues are listed below.
Exhaust bolts have broken on the exhaust manifold, this vehicle has the v8 engine. Dealer explains that this needs fixed as carbon monoxide could enter the passenger cabin. There was an accident with the vehicle a year ago, I contacted my insurance company to see if it was related to the accident. They claim that it is not related to the accident and that gm vehicles model year 2000 to 2007 with this 5. 3 v8 engine have reported these bolts breaking and informed me to contact gm about reimbursement for repair expenses. I do not have the $2000 for repairs and am concerned about the safey of my family while in the vehicle.
Low beams intermently go off and on ! exhaust manifold is cracked causing a leak ! all dash gauges but fuel gauge dont work !.
Ticking noise under hood when engine is running. Diagnosed as leaking exhaust manifold. Bolts securing exhaust manifold broken. Repair requires removing cylinder head to remove old bolts. Cost estimated at $2,000 plus. Complaint filed with Chevrolet. Claim initially denied. Continue to ask for assistance. Vehicle is located at trecek chev in portage wisconsin and is available for inspection.
The exhaust manifold on my 2003 chevy Trailblazer ext has cracked at 54000 miles, and must be replaced at a cost of around $400. I contacted gm directly, and was told that this is considered "normal wear and tear. " I disagree. If that is the case, then why would I keep the vehicle, knowing I can anticipate another costly repair within the reasonable life of the vehicle. My local chevy dealers service manager tells me gm is repairing many of these parts on the 4. 2 l. Engine of not only the Trailblazer, but other vehicles as well. A local aftermarket parts store also says his suppliers have many of these parts on hand. More than one might expect if this were an unexpected occurrence. I believe gm knows it has a part that is unsound, but it is unwilling to correct the problem at its expense. An exhaust manifold is not supposed to fail within less than 4 years, and at 54000 miles. That is not "normal wear and tear.