Five problems related to manifold/header/muffler/tail pipe have been reported for the 2003 Chevrolet Silverado. The most recently reported issues are listed below.
2 problems. Anti-lock brakes pulsate intermittently. Engine 6. 0l exhaust manifold bolts are broken. Causing emissions codes to set and exhaust gases into cab. I have found that this a common problem for 1999 to 2007 v8 engines. Gm said there is no recall or warranty for this problem.
I have several broken bolts on my exhaust manifolds. My check engine light goes on and off for emissions related codes. I will not be able to pass a smog test unless this is fixed. Several auto shops want about $1,000 to fix this. Its an ongoing problem and is known by chevy/gm and yet they will do nothing to help or fix it. This should be recalled immediately!.
While idling at a red light the smell of exhaust fumes became prevalent inside the passenger cabin. Upon inspection of the exhaust system it was determined 5 of the exhaust manifold bolts had prematurely failed allowing exhaust gas to escape from the engine into the engine compartment and into the passenger cabin. The vehicle is currently used sparingly where family members or friends are not allowed to ride in the truck until the exhaust manifolds are repaired.
Warranty on catalytic converters on chev Silverado 1500 v6 4. 3 went bad corrosion inside rattling. Replaced ,but not the muffler which was checked at same time and the bellow was found to have been loose due to corrosion,and debris from the converters, but was not covered on warranty. Why? I was informed it wasn't 't part of the exhaust system. ??? the exhaust goes through the converters and out the muffler.
While driving at low speeds vehicle vibrated and the consumer heard a loud humming noise. Dealership informed the consumer that the problem pertained to the muffler.