While still accelerating after entering freeway traffic from a gently ascending freeway on ramp, this 1999 Chevrolet Suburban (100K miles) very suddenly began to loose power and shake (not vibrate) violently. Although the engine did not completely stall, the vehicle decelerated very quickly, and there was a clear sensation that power steering and power brakes were becoming inoperable. This was very dangerous, as this freeway on ramp leads directly onto the #1 lane of the freeway, and there was no shoulder. An odbii code scanner indicated code P0300 (multiple cylinder misfire). The vehicle was towed to a GM dealership who advises that a valve stem has broken in cylinder 5. repairs have been quoted at $2000 to $3000 on a vehicle touted as "heavy duty" who's primary use is taking toddlers school and grocery shopping. The vehicle remains un-repaired because of the cost. This is inexcusable at a mere 100K miles.

- Los Angeles, CA, USA

Engine stalls at various speeds.vehicle has been inspected by dealer on four occasions. Dealer has not been able duplicate or correct the problem. Feel free to provide any further informantion.

- Pawtucket, RI, USA

Vehicle stalls/electrical resets when engaging reverse or drive regardless if vehicle is cold or hot.

- El Paso, TX, USA

The engine makes a clattering noise during acceleration, the dealer inspected the vehicle and stated that the "R&R LH header" had to be replaced. Nlm

- Bella Vista, AR, USA

While towing a trailer at 55mph, black smoke came out from the rearend and oil blew out all over the back of my car and the trailer. This was the first of four occurrences.

- Garden Grove, CA, USA

When brakes are applied front pulls to left, and sometimes to right. This also happens when a bump in road is hit. Dealer has worked on this vehicle a number of times, but problem has not been solved. Consumer also complains of soft pedal, steering wheel also pulsates when braking, dealer has switched rotors from side to side, replaced out of round rotors, replaced front brake pads twice, and resurfaced rotors and drums, dealer rotated tires and vehicle still pulled. Steering wheel found off center. Center seat recliner handle broke, dealer replaced handle. Vehicle experienced oil leak. Driver door power switch loose in door. Reverse low planetary gear was broken causing a grinding noise at low gear, valve body and gear were scored due to metal in transmission. Air pump replaced due to being very noisy.

- Canoga Park, CA, USA

While driving at 35 mph power decreased to 30 mph without prior warning. Also, there was a knocking noise coming from the vehicle.

- Calabasas, CA, USA

While driving across country engine just suddenly shut down without warning. Dealer has been contacted, and problem cannot be duplicated.

- Costa Mesa, CA, USA

Intermittently while driving approximately 70 mph down the interstate the vehicle just dies without any warning. Dealer and manufacturer have been notified.

- Cooper, TX, USA