Six problems related to engine exhaust system have been reported for the 2005 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 GMC Sierra 2500 based on all problems reported for the 2005 Sierra 2500.
Exhaust manafold bolts are breaking off for no apparent reason. I have four broken already and an exhaust leak developing. This appears to be a defect in manufacturing. I have a friend with two of the same trucks that the same thing has happened to. There are numerous complaints posted on the web. I have had many vehicals over the years and worked them hard but have never seen a broken exhaust manafold bolt on any of them. This can be a dangerous situation as having exhaust leaks under hood could cause a fire. As far as I know gm has not issued a bulletin or recall on this but there should be some remediation as this is an expensive repair and it is not a failure caused by the lack of maintenance. I have also heard reports of repaired units breaking again in about the same number of miles and having to be repaired again.
Exhaust manifold bolts broken off (4). 6. 0 l engine and exhaust is escaping and entering cabin.
Exhaust leaking under hood due to broken exhaust manifold bolts. Carbon monoxide hazard. This seems to be a common problem for owners of several years of gm engines.
The exhaust manifold bolts were broke on side of the exhaust manifold so far. The mechanic at fw tucker and son, in, oswego, NY 315-342-0444 stated that they have replaced these on 12 trucks and after further research, I have found that there have been over 12,000 vehicles that have to had these replaced. The truck is less than 5 years old and has 54,000 miles on it. I called and filed a complaint with GMC (service request #[xxx] ) and was told that they found that it wasn't a common problem and they found no indication that it was an ongoing problem, however 12,000 vehicles is an ongoing problem. The vehicle is a 2005 GMC Sierra 2500hd truck. I had to pay to have the exhaust manifold removed, to have the bolts extracted, the cost of the new bolts and the installation of the bolts, new exhaust manifold gaskets and seals. I also had to pay to have the engine oil removed and the replacement of the engine oil dipstick tube. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
Ticking noise coming from engine compartment.
This is my 2nd GMC 6. 0l that has broken exhaust bolts first truck broke 3 bolts at 32,000 miles, replaced by dealer and broke bolts off again at 39,000 miles. Now have 2005 with 51,000 mile with three broken manifold bolts and an exhaust leak. This is a very expensive repair that is a design problem.