Engine Exhaust System Problems of GMC Sierra 1500

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving at an undisclosed speed and approaching a stop, the vehicle lost motive power. There was an abnormal exhaust odor and smoke coming from the exhaust pipe. The engine and fuel lights were illuminated. The vehicle was towed to the local dealer and was diagnosed with a misfire in cylinder #5, and the exhaust lifters and camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 50,000.

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The contact owns a 2018 GMC Sierra 1500. The contact stated that after starting the vehicle, there was an abnormal ticking sound coming from engine compartment. The vehicle was taken to the local dealer who diagnosed that the exhaust manifold bolts had fractured and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not yet notified of the failure. The failure mileage was 64,000.

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A very strong "ammonia" odor comes into the cabin. This happens when the def fluid is going into the exhaust system for the regen process. The odor makes people inside nauseous and dizzy. Must open widows or stop and get out of the vehicle. Our GMC dealer can find no codes or problems with the exhaust system. We have also noticed that the def fluid has gone down very quickly sometimes during this event. It is random. Some days nothing, other trips 3 and four times that the odor occurs. Looking online- there have been many post about this problem.

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Vehicle equipped with l87 6. 2l. At 197 miles engine suddenly ceased operating and would not restart. This occurred while stopped on private road. Vehicle had to be towed to dealership where they found p0300 and diagnosed broken #4 cylinder exhaust valve spring.

Broken exhaust manifold bolts. Doing preventative maintenance and an inspection I noticed four bolts on the exhaust manifold broken. The front and rear on both right and left sides are broken off. . Read more...

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Broken exhaust manifold bolts. Factory installed exhaust manifold bolts routinely break on both sides of the engine. Nature of the failure and location of the broken bolts in the heads of the engine most often necessitate very expensive professional repair.

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2005 GMC sierra truck with 5. 3l motor. Exhaust manifold bolts failure.

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The contact owns a 2009 GMC Sierra 1500. While driving 25 mph, the contact stated that the lifters inside the motor malfunctioned and caused the vehicle to make a ticking and rattling sound. Occasionally, a gray cloud of smoke would emit from the exhaust pipe. The contact stated that the noise in the vehicle sounded as if there was no oil in it. The failure occurred several times. The vehicle was taken to an authorized dealer where the contact was told that they would not perform any repairs unless the vehicle was inoperable. The current mileage was 5,020. The failure mileage was approximately 100.

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The contact owns a 2009 GMC Sierra 1500. The contact stated that the vehicle emitted smoke from the exhaust pipe since it was purchased. The vehicle was taken to an authorized dealer where oil was added to the engine. The service manager inspected the vehicle and stated that the engine oil lifter operated as a 4 or 8 cylinder and when it shut off, the oil supply released smoke. The dealer stated that they could not service the vehicle until there was a complete failure. The failure mileage was 6. The current mileage was approximately 5,040.

The contact owns a 2007 GMC Sierra 1500. While driving 30-35 mph, the air bags on the ceiling of the vehicle deployed without an impact. The vehicle was taken to the dealer for repair. The failure and current mileages were 26,146. Updated 11/24/08 the vehicle had an exhaust leak, the drivers side window was inoperative, the window switch and connector had melted, the heater seats didnot work, the rear tires were out of balance. Updated 11/26/08.

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The contact owns a 2007 GMC Sierra 1500. After purchasing the vehicle, the contact began experiencing a drastic vibration. A defect was discovered; however, there is no remedy available. The dealer replaced the powertrain, wheel, wheel rotation, and driver assembly, but the failure still persists. General motors has yet to offer a response as to how they can assist. The failure and current mileages were 1,600. Updated 03/04/08.