The contact owns a 1999 Chevrolet Silverado 3500. The contact stated that there had been extreme hesitation with the engine power. The service engine warning light randomly illuminated for years and the part failed to function properly. The contact replaced the engine twice by a certified mechanic and, due to the failure continuing, the vehicle was diagnosed by a mechanic who stated that the part would need to be replaced a third time. A mechanic stated that there were five stress fractures in the engine block prematurely. The manufacturer was notified of the failure and provided no solution. The approximate failure mileage was 50,000. Updated 08/16/16 consumer stated lot of problems with the engine. Every mechanic consumer spoken to about the 6.5 Chevy turbo diesel said the same thing "they are junk" the blocks crack and they don't last. Since I have contacted you the engine has been pulled and there are 12 stress cracks in the engine instead of 5. updated 06/12/18

- Springfield, IL, USA

Brakes: Since approximately 136,000 miles to present miles, the vehicle has exhibited an ABS and brake warning light intermittently on the dash. This is a known GM issue that was recalled in certain states, but not all. It stems from faulty soldering points in the ABS control module and can affect the vehicles ability to stop correctly which could result in an accident. Engine/ emissions: The passenger side exhaust manifold bolt has broken off. This is a known issue with this 5.3L engine as well as the 4.8L and 6.0L engines. GM has failed to recall in spite of having thousands of complaints. The issue can cause failed emissions and potentially engine fires. Engine: As of 164,000 miles, the engine is experiencing loud "piston slap". this is a known issue which GM addressed through redesign in later models. It leads to excessive engine wear and potential engine failure. It appears to be a factory defect, yet GM has claimed it is not important despite numerous complaints from customers that the engines have required replacement as a result.

- Vancouver, WA, USA

Started my truck one day and heard a noise I haven't heard before. Looked under hood to see where it was coming from and noticed noise was coming from the exhaust manifold. The bolts have broken off leaving the manifold leaking exhaust fumes. Came to find out that this is a common but very dangerous problem on Chevy trucks. Many Chevy vehicles have this issue and if not corrected could lead to more engine troubles or worse yet a fire.so now my vehicle is a safety hazard! Chevy should recall this safety hazard, which could become dangerous.

- Menomonee Falls, WI, USA