2005 GMC Sierra 2500 engine problems

Filed Dec 23, 2023 · Airbags, Electrical · MD

1). Dash light stays on constantly and reads SERVICE AIR BAG. This was checked out at an auto repair shop. If air bag doesn't respond, it could be fatal. 2). Check engine light is always on. Was checked out at an auto repair shop and repaired on 10/19/2021. 3). Right engine exhaust manifold is cracked and leaking exhaust. Was checked out at a muffler repair shop. In time I'm afraid fumes my leak into the truck cab. 4). A brake line ruptured and was repaired on 09/02/2020.

Filed Sep 1, 2017 · Electrical, Engine · 5 miles · TX

Always turns off while driving or while at idle

Filed Aug 20, 2013 · Engine · 85,123 miles · MA

2005 gmc 2500hd with 6.0 liter gas motor. Left and right bank exhaust manifold to engine bolts broken off in head. Leaking exhaust fumes and causing my check engine light to come on. Gm need to have a recall on this due to the number of vehicles out there with this problem. This is also an emission problem due to it will cause the cat converter to overheat.. Epa? Thank you

Filed Nov 13, 2012 · Engine · 111,000 miles · IN

All exhaust manifold bolts are defective causing them to break, when they do the exhaust manifold separates from the cylinder head in turn directing all emissions from the engine into the air, and cabin of the vehicle. This could cause a fire if not corrected. One spark would set the vehicle on fire.

Filed Oct 24, 2012 · Engine, Transmission · 35,000 miles · NJ

Exhaust manifold 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 vehicles over the years and worked them hard but have never seen a broken exhaust manifold 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.

Filed Sep 4, 2012 · Brakes, Engine · 42,000 miles · CT

Tl* the contact owns a 2005 gmc sierra 3500. The contact stated that while driving 40 MPH, the brakes were engaged and the vehicle failed to stop. The contact mentioned that he had to engage the emergency brake in order for the vehicle to stop. Also, the contact stated that after inspecting the vehicle he noticed oil leaking. The vehicle was not taken to the dealer. The vehicle was taken to an independent mechanic who diagnosed that the brake lines needed to be replaced. The manufacturer was made aware of the failure who did not offer any assistance. The failure and current mileage was 42,000. Updated 10/24/12 *cn updated 11/08/12

Filed Jan 16, 2012 · Engine · 94,500 miles · CA

Broken exhaust manifold bolts. Front and rear manifold bolts have broken on both the passenger and driver sides. As a result exhaust manifolds are now warping putting undue stress on remaining manifold bolts and creating an exhaust leak. Bolts are steel, manifolds are cast, and heads are aluminum. Dissimilar metals, heat, and moisture have caused the bolts to prematurely rust and fail. Emissions dilution will not allow for a passing smog test in 2013. Gmc refuses to address the issue at hand, even though this is a recurring issue on all v8 engines. Estimate to repair; $2500.

Filed Aug 31, 2011 · Engine · 108,267 miles · MO

This model year has an engine defect from the manufacturer. The head gasket is known to break causing the engine to overheat. This can cause several safety issues dependent on the circumstance at the time of the engine overheating. After some research, it is openly known that this is a defect from the manufacturer for this particular engine year.

Filed Aug 1, 2011 · Body, Brakes · 78,000 miles · CT

Major rust of the undercarriage of my 2005 gmc sierra 78,000 miles. So far had to replace brake rotors, brake lines , fuel radiator and lines. Frame and cross members as well as control arms are all rusted. Made complaint with gmc they had me bring to a dealer to tell me this is normal rusting. Two of my relatives have the same year truck but are not experiencing this issue and we all live in the same area drive same roads.

Filed Jun 19, 2011 · Engine · 51,000 miles · NJ

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.