Exhaust and manifold cover bolts are too weak and the heads break off. I had to replace all of them with racing bolts. Much better now.

- Houston, TX, USA

The contact owned a 2001 Chevrolet Suburban. While driving the vehicle, smoke emitted under the hood of the vehicle. The contact coasted the vehicle to the side of the road and exited the vehicle. The vehicle caught on fire, which was extinguished by the fire department. A police report was filed. The vehicle was towed and destroyed. The manufacturer was not made aware of the failure. The approximate failure mileage was 200,000. The VIN was not available.

- Garden City, KS, USA

The contact owned a 2001 Chevrolet Suburban. While driving at an unknown speed, smoke emitted from the engine compartment of the vehicle. The contact pulled over and discovered that the front end and front wheels were on fire. The fire department extinguished the fire. Fire and police reports were filed. There were no injuries. The vehicle was towed to a salvage yard and deemed destroyed. The manufacturer was not notified of the failure. The failure mileage was 204,654.

- Charlotte, NC, USA

When vehicle is idling while not moving extreme amounts of exhaust fumes are entering the cabin area through the ventilation system. This is due to defective exhaust manifold bolts which are breaking allowing the exhaust manifold to open and allow fumes to enter the engine compartment which results in the exhaust fumes entering the passenger cabin area through the ventilation system. This is a health issue for passengers inside the cabin breathing the toxic exhaust fumes. This should be a safety recall on GM to fix the problem due to poor engineering design and for using poor quality components which fail for no reason. Also this is an extremely dangerous situation for passengers inside the vehicle, which have to breath the dangerous exhaust fumes. GM should be made to repair all vehicles affected by this problem which were designed and engineered with inferior parts which are causing this dangerous situation for millions of people across this country.

- Paducah, KY, USA

Exhaust bolts broken and causing a leak making the vehicle unable to pass emissions also. Steering stabilizers broken.

- Albuquerque, NM, USA

The contact owns a 2001 Chevrolet Suburban. The contact stated that the engine stalled without warning. The engine warning light illuminated prior to the failure. The contact was able to drive the vehicle to an independent mechanic for diagnostic testing, which located a failure code at the crankshaft position sensor. The manufacturer stated that the vehicle was not included in NHTSA campaign number: 07V521000 (engine and engine cooling). The vehicle was not repaired. The failure mileage was 101,000.

- Portcharlotte, FL, USA

The contact owns a 2001 Chevrolet Suburban 1500. While driving at 65 mph, the engine stalled. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 180,000. Updated 7/28/15 updated 10/18/2017

- Madison Heights , VA, USA

The contact owns a 2001 Chevrolet Suburban. The contact stated that while driving at various speeds, the engine stalled. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was unknown.

- Campbell , OH, USA

The bolts that hold the exhaust manifolds down are breaking off at the heads and causing exhaust leaks. Which are in turn causing my catalytic converters fail prematurely. I hope GM fixes this massive problem with there ls V8 engines!

- Avon Park, FL, USA

The contact owns a 2001 Chevrolet Suburban. The contact stated that the vehicle failed to start without warning. The vehicle was towed to an independent mechanic, who diagnosed that the came shaft needed to be replaced. The vehicle was not repaired because the replacement part was not readily available. The manufacturer was made aware of the problem. The approximate failure mileage was 124,000. Updated 04/15/14

- Lynnwood, WA, USA