Transmission failure at 53,000 miles. Vehicle engine runs high RPM but fails to shift, especially from 2nd to 3rd gear. Dealer says it will have to be replaced. The problem is dangerous, especially in city traffic where trying to negotiate at traffic light is a hit or miss proposition.

- New Iberia, LA, USA

I have a '05 Chevrolet Silverado, I recently discovered that when the key in the ignition is turned to the accessory position (one turn with the vehicle off), the vehicle will be able to shift out of the parked position without applying the brake. I have taken it to the Chevrolet dealer they say that is how it is supposed to be. Not only my truck did it, my friends '03 Ford F-350 also does it too! I am not sure if all vehicles are designed like that or not. When the vehicles key is in the run position with the vehicle off, you have to push down the brake pedal before you can shift out of park. The whole idea I thought was to prevent a young child from shifting a vehicle out of park and roll into traffic! the way my truck, and possibility a whole lot more was designed, a child would have a 50-50 chance of turning the key just one time, and that could lead to a catastrophe.

- St. Charles, MO, USA

Automatic transmission at times hesitates before engaging when accelerator is pushed. It has happened numerous times - the last being the date listed below.

- Mill Valley, CA, USA

2005 Silverado hybrid engine turns off at stops when brake is applied. The hybrid turns engine off at stops when brake is applied. The consumer feels that it takes too long for the engine to pick up power after taking foot off the brake and applying the accelerator. The consumer feels that the delay is dangerous when trying to enter fast moving traffic from a stop. While stopped on an incline vehicle rolls backwards while the consumer's foot is in transition from the brake to the accelerator pedal.

- Portland, OR, USA

Last Feb. Purchased a new Silverado truck. GM replaced the transmission at 480 miles. Ever since then I have had a vibration in the rear. I have had the truck to the shop on several occasions. The problem is intermittent and they can't locate the problem whenever I take it in. The problem is most common at speeds of 65-70 mph. The vibration is so bad that the mirrors rattle. Also lately, I have a different vibration (also intermittently) at slower speeds while going up hills. Dealer also unable to diagnose unless the problem occurs while they have the truck.

- Marshfield, WI, USA

In Feb. 2005, bought a new Chevy. Silverado hd truck. 6 days later while 90 miles from home, transmission burned out of truck. Unable to go faster than 35 mph, smoke rolling out of rear. Transmission slipping while this going on. Parked near a gas station to call roadside assistance, absolutely no help what-so-ever. This was at 6:30pm and they couldn't locate a tow truck. 11 days later I got my truck returned with a new transmission(GM refused to give me a new one)

- Marshfield , WI, USA

I bought a new 2005 Chevrolet Silverado in may of 2005. A few weeks after owning my truck, and with less than 1,000 miles on it, I noticed the auto transmission would slip. It would only occur when I was accelerating from a stop. Basically, I would give the truck gas and the engine would rev up to about 2,000 RPM's, without the vehicle moving, and then it would all of the sudden make a loud thud sound and then lurch forward, as if it was not in gear and then all or the sudden put into drive. This can't be good for the transmission of the engine. I called the Chevrolet dealership and asked them if I brought my truck in if they could look at it and they said they would, but if they could not duplicate the problem or if there was not any check engine light on they would not be able to diagnose the problem to fix it. The slipping of my transmission has occurred about a dozen times. The problem is it works fine most of the time except when it slips. So I have no idea when it will happen. I could stop and accelerate 100 times and it won't slip. Then just out of the blue it will decide to slip, and make that terrible banging thud of the transmission engagement. I hope that Chevrolet finds out what this problem is and fixes it so I don't have to replace a transmission after my warranty ends after 3 years or 36,000 miles. Not to mention the safety hazard if I had to accelerate to get across traffic and my trucks transmission hesitated and I got into an accident of it.

- Dallas, TX, USA

1. driven vehicle for 5,600 miles, no special events 2. while in reverse, vehicle accelerates and decelerates without pushing on the accelerator pedal. 3. computer replaced after we refused to drive, GM said vehicle was safe to drive.

- Carol Stream, IL, USA

Truck bounces. GM replaced with same results. Replaced with aftermarket monroe gas magnums which helped some. Suspension is still weak. Transmission slips while driving. Informed dealer who said transmission guy was not in that day. Will contact the dealer again.

- Astor, FL, USA

The transmission slips upon acceleration. The transmission will slip when crossing an intersection, making the vehicle volurnable to be hit. The RPM's rise while the vehicle is in drive and the vehicle comes to an almost stand still. This has happened a few times but no accident occered. The vehicle's transmission slipped while crossing a 4 lane divided highway with traffic flowing at 65mph. No accident occered and the transmission engaged before an accident could occered. GM has been contacted many times with no response to fixing the problem. GM wants to duplicate the problem before fixing, and telling me no service can be done at this time. GM wants me to drive the vehicle even though they are aware of this safety hazzard and putting me and my family at risk on the highways.

- Salem, WV, USA

I noticed a month after purchasing my 2005 Silverado Z71 extended cab that if the key was turned to the 'acc' position, this disables the lock that requires the brake pedal to be depressed fully to shift the vehicle out of 'park'. I brought this to the attention of friedns and family who have GM trucks and SUV's. all these vehicles (2004-2005) do the exact same thing. I took my concern to web forums. Though members thought I was nuts, they tried this on their vehicles and the same thing happens. It seems to be vehicles that have changed the acc location on the ignition. The acc location used to be turned back toward the driver, but now it is one click toward the dash now. This info is not in the owners manual. If parked on any incline and the vehicle is knocked out of gear you would have difficult time braking or steering.

- Coopersville, MI, USA