Manifold/header/muffler/tail Pipe problems of the 2003 Chevrolet Tahoe

I brought in my 2003 Chevrolet Tahoe to cutter Chevrolet in honolulu, hawaii to report an "engine light on" concern. Service advisor julianna parks reported that the issue may be attribute to (2) broken exhaust bolts on my vehicle's 5. 3 liter mfi iron v8 engine. Cutter Chevrolet is at 711 ala moana boulevard, honolulu, hi 96813. In following up today October 18, 2017, shop manager brad eisen reported that these bolts breaking is not a common problem, and that there is no recall for such issues. Cutter Chevrolet has had my vehicle since October 01, 2017 and reported that in addition to my $500+ inspection costs, that my costs for repair thus far has exceeded $1,400. 00 in their attempts to repair these broken bolts, and that they expect the final cost to be much higher by the time they are done as they have to contract a specialist mechanic from another town to come into the cutter Chevrolet repair shop this coming Saturday October 21, 2017 to meet with manager ms. Tina to do special work to remove these broken bolts. This is ripoff by gm to have such sub-quality exhaust manifold bolts breaking off. Help!!!! gm needs to do a recall on this!.

On November 5, 2015, I took my 2003 Tahoe in due to the fact that an exhaust manifold bolt had sheared off during the normal course of driving. I bought my Tahoe new and have always had it service at the mccarthy-morris Chevrolet dealership on overland park, KS. I realize that over time parts on a vehicle will break and at 118,000 miles I should expect to incur maintenance expenses. However, based on my research gm used a substandard bolt and this issue impacts millions of gm v8 motors. From a safety perspective, I had the repair done because I didn¿t want to risk having exhaust fumes entering the cab of my vehicle. My understanding is that this type of exhaust leak could have epa implications as well. In order to have the repair done, the dealership had to pull the head because one of the two bolts that sheared off was flush with the head and had to be drilled out. Total cost was $1,381. 07. The sad fact is that after getting the vehicle back, it is running rough and chance are I will have to return it back to the dealership for additional repairs. I contend that when major repairs like this are done, the vehicle is seldom the same. It took 5 days to get it back do to the weekend. If the NHTSA won¿t take any actions over concerns about the exhaust leak, I hope some law firm might consider starting a class action suit. I have no issue paying for repairs caused by normal wear and tear, but this appears to be a defect that resulted from Chevrolet using a substandard bolt.

I am one of millions of 1999-2007 Chevrolet v8 truck engine owners, who is told by their gm mechanic that the exhaust manifold bolt(s) has broken, leading to expenses ranging from $500 to $1,500. Gm built the engines with substandard bolts that do not last in comparison to the rest of the engine and vehicle. One or more will break, which causes an exhaust leak and check engine light, and therefore the vehicle is out of service as it cannot pass state emissions tests. Additionally, some of the exhaust leaks are near other sensors which can cause faulty readings or unsafe conditions. Those who attempt to self-fix this gm-caused problem face unsafe conditions, as they are difficult to get to, require a welder to fix, may damage surrounding equipment, etc. The need for a recall is well-known and very large, and it is time for a recall on these, similar as have Ford and Toyota had recalls on similar issues. Gm survived due to a bailout from taxpayers (many of them their own customers); it is time for gm to perform responsibly to a needed recall. In the picture, the broken-off bolt head is evidenced a few inches to the left of the rusty one that still exists, where there is an empty hole (the bolt remains stuck inside the engine, and requires boring out or welding something on in order to back it out).

Exhaust manifold bolts breaking leaving studs in the heads, heating up engine compartments, releases carbon monoxide, affects O2 sensor and catalytic converter. Will not pass emissions in some states. Gm not standing behind this 1999-2008 issue. It is a safety issue and is expensive to fix. Gm mechanics denying any such issues. Please check- in to this. Our whole fleet and our personal trucks affected by this.

Consumer complained about excessive vibration. Nechanic replaced engine mounts/ tansmission, and intermittent steering shaft, but vibration continued. There was no final solution.

Consumer stated vehicle rumbled and made noise while stopping at a red light or stop sign. Consumer took vehicle to dealer/mechanic 5 times, they replaced the muffler, but the problem was getting worse.

Ever since purchasing my Chevrolet Tahoe lt brand-new in August of 2003, the muffler and/or the exhaust system has made an exploding sound both while the vehicle is running and after it is shut off. At stoplights and after being parked, you both hear and feel explosions from under the truck. Gm contends the sound is steam building up in the muffler and exploding, but admits it is not a "normal" backfire, and states that some Tahoes do it, and some do not. They have released two separate fixes for the problem but neither has been effective, and the last one came out over a year ago. Official gm policy prohibits replacing any mufflers/exhaust systems on vehicles exhibiting this problem - owners are simply told the explosions are normal. After much discussion, gm replaced my muffler, and the second one does the same thing. Needless to say, it is an alarming sound and feeling to have in a new vehicle, and logic dictates that steam explosions inside a metal box can only go on for so long before serious damage is done (I. E. The muffler itself explodes near the gas tank. ) I'm not sure what the NHTSA can do, but any help you can provide is most welcome.