Nine problems related to manifold/header/muffler/tail pipe have been reported for the 1999 Chevrolet Silverado. The most recently reported issues are listed below.
Brakes: since approximately 136,000 miles to present miles, the vehicle has exhibited an abs and brake warning light intermittently on the dash. This is a known gm issue that was recalled in certain states, but not all. It stems from faulty soldering points in the abs control module and can affect the vehicles ability to stop correctly which could result in an accident. Engine/ emissions: the passenger side exhaust manifold bolt has broken off. This is a known issue with this 5. 3l engine as well as the 4. 8l and 6. 0l engines. Gm has failed to recall in spite of having thousands of complaints. The issue can cause failed emissions and potentially engine fires. Engine: as of 164,000 miles, the engine is experiencing loud "piston slap". This is a known issue which gm addressed through redesign in later models. It leads to excessive engine wear and potential engine failure. It appears to be a factory defect, yet gm has claimed it is not important despite numerous complaints from customers that the engines have required replacement as a result.
The contact owns a 1999 Chevrolet Silverado. The contact stated that the exhaust manifold studs detached from the cylinder head causing exhaust fumes to leak from the engine. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 90,000.
Started my truck one day and heard a noise I haven't heard before. Looked under hood to see where it was coming from and noticed noise was coming from the exhaust manifold. The bolts have broken off leaving the manifold leaking exhaust fumes. Came to find out that this is a common but very dangerous problem on chevy trucks. Many chevy vehicles have this issue and if not corrected could lead to more engine troubles or worse yet a fire. So now my vehicle is a safety hazard! chevy should recall this safety hazard, which could become dangerous.
Broken exhaust manifold bolts. 3 bolts have broken off on their own. 2 from one side and one from the other. V8 6 liter motor.
I have a loud ticing noise coming from the left rear of the engine. While I was pulling my 5th wheel the noise kept getting louder and louder and had loss of power. By the time we got to the camp ground it sounded like I had lost my mufler. We took it to muffler man of ludington and they discovered that 4 exhaust manifold bolts had sheared off, 2 on left year and 2 on right rear of both manifolds. They took the manifolds off and replaced all the bolts with new ones except for the very left rear was sheared off flush and could not get a drill in to drill out and tap. In order for them to get this out they would have to pull the head which would have cost $1000. 00. They put it back together and the tic was gone. This only cost me 6 hours of vacation with my family and $200. 00. The tic has returned.
The gas pedal sticks. I have to clean my throttle body out with cleaner about every 1000 miles. Even after a cleaning it still sticks a little. This is a safety concern, because I have to use more pressure on the gas pedel, then it unsticks and the truck lurches foword with no control.
Replaced muffler and pipe assembly due to exhaust system noise.
Every morning when starting vehicle up engine makes noise, and big cloud of smoke comes through the tail pipe.
Constant loud ticking noise from left side of engine/underbody. Only audible while truck is in gear and under accelleration. Suspect faulty catalytic converter or manifold to exhaust seals. If leaking, could pose health threat. Dealership and Chevrolet advised. So far, response is that is the way it was designed. Noise is simply engine harmonics passing through tailpipe. I disagree.