Complaint on GM exhaust manifold bolt defect, inferior brake/ fuel lines. Mine is a 2005 GMC. Defective exhaust bolts affect 12 million GM trucks from 1999 to 2007. GM exhaust bolts are to small brittle for securing exhaust manifolds. Bolts snap off causing exhaust leaks. Trucks not passing emissions and dangerous exhaust fumes entering the drivers compartment of the vehicles while driving. I and my family get a carbon monoxide headache when I drive it and have had to pull over to the side of the road feeling like I was going to pass out, open windows and sit until I felt better. I have also had problems getting my truck to pass emissions due to the leaks and the leaks are causing the vehicles to be none epa compliant because of O2 sensor errors resulting in failed emission test. Also brake and fuel lines are not suitable for northern states causing brake failure with out warning, fuel lines are all rusted and swelled in danger of bursting causing fire without warning. Ford and other vehicles I have worked on use stainless fuel lines and look like new for life of vehicle. I have also seen other manufacturers use powder coated brake lines on the entire vehicle and 20 year old vehilces show no rust problems. My 2005 GMC from the rear end brake hose to the wheel cylinders they used powder coated brake lines. Those lines look like new yet. GM knew the powder coated lines were better why did they use faulty galvanized steel on the rest of the truck" as it is now my truck can't be operated on the road without $3000 in repairs due to GM using poor quality parts. The truck has had these problems for over 5 years now and only has 138,000 miles. Trucks like this in southern states have over 250,000 miles, lines still good. Recall needs to be done. GM is making money now you tube video about defective bolts https://www.youtube.com/watch"V=0yg6wlbnzgi

- Plymouth, WI, USA

Exhaust manifold bolts on each side of engin snapped off for no appearant reason / normal use, big concern of exaust fumes entering the cab

- Hanford, CA, USA

Castech cylinder heads on 2001 through 2006 5.3L vortec engines are porous and allow antifreeze to seap into the oil. This is a safety concern as it can destroy the engine (oil doesn't lubricate correctly, sludge buildup) and leave someone, at the least, stranded, at the worst, it can cause a huge engine fire. GM has been aware of this since 2007. They issued a bulletin describing the problem and what needs to be done to fix, but no recall. To fix either the cylinder heads need to be replaced ($2500) or the entire engine needs to be replaced ($5500). My vehicle is a 2005 GMC Sierra 1500 sle. Also the problem has been confirmed by a licensed mechanic. The following is a link to the GM issued bulletin. WW2.justanswer.com/uploads/bluegorilla/2008-12-05_142924_coolant_loss_5.3.pdf

- Boise, ID, USA

Concerning GM 706 castech cylinder heads/GM tsb 06-06-01-019B I have a 2005 GMC Sierra which has slowly been leaking coolant for about 6 months. I have had it looked at and the dealer informed me that I have a 706 castech cylinder head that is notorious for cracking and leaking. The dealer told me there was coolant inside my oil and recommended replacing the engine. As I have begun researching this issue I realize these cylinder heads affect millions of GM vehicles and loyal customers. GM has issued a tsb and are aware of the issue at hand and in my, and many other customers this should have been a recalled item. I am calling on GM to fix this issue/mistake.

- Pekin, IL, USA

Engine oil leak on or around rear main seal. As oil drips while driving the oil lands on the exhaust pipe and begins to burn. This leak landing on the exhaust while hot can catch on fire.

- Virginia Beach, VA, USA

I found 2 broken exhaust manifold bolts on my 2005 Sierra (70, 717 miles), 1 on each side, 1 was actually missing & the other was just hanging there, I then went to check my wife's vehicle, a 2003 Chevy Tahoe ( 90,420 miles) & that also has 2 missing, 1 from either side, you cant imagine how sick I am at this point, both our vehicles are in need of major repairs, please tell me that General Motors will need to recall these vehicles & make the needed repairs, sick to my stomach & cash strapped, [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Watertown, WI, USA