general problems of the 2003 Chevrolet Silverado

My 2003 chevy Silverado goes into gear with out pressing on the brake, also the truck will go into gear with out the keys in the igintion. The e-brake is also defective, the e-brake does not hold the truck. My 2 yrs old son was sitting in the truck on 9/20/2011 when the truck went into gear. I live on a incline my truck rolled down the hill while I was chasing the truck truck on foot, the truck finally came to a stop when it hit a 98 Toyota tacoma which was parked in the drive way accross the street. The e-brake was set , the keys were not in the truck, the truck was not running! my son could have killed himself or someone else due to the fact the truck is not safe!.

1. Poor ride, vibration, while driving at various speeds. Mostly between 35 to 50 mph. Had the problem with "stock" tires. Replaced with after market tires, slightly larger. Still had annoying vibration. To a point that I do not like to drive the vehicle! 2. Fuel economy sucks! I "upgraded" from my '92 GMC pickup which gave me 12 to 14 mpg around town to 15 to 18 mpg on a trip; to my "new" chev. Which is good for about 9. 5 to 9. 8 mpg around town and the best ever, on a trip was 13. 4 mpg!!! 3. The bench-type seat is not adjustable to remove the "vee" feeling when driving. 4. The self-darkening mirrors are a hazard when trying to backup or change lanes! 5. The passenger front seatbelt locksup and can't be freed unless you unbuckle and reattach the belt, only to have it lockup again! I have had the vehicle back to two different dealers on three seperate occasions principally for the mileage and the very annoying vibration! I have contacted general motors, also with no success! I've changed tires, asked to have the transmission checked for the vibration, only to have seperate service managers tell me that "it seems okay to me, and that there's nothing on the computer to indicate a problem!" and "you put bigger tires on the truck! you can't do that!" I just "celebrated" (?!!!) my first anniversary with the truck and its been a miserable year!.

2003 Chevrolet Silverado 4wd, abrupt jerking from transmission or drive train, tends to occur when accelerating at low speeds, distracts from good control of truck. Truck has 14,000 miles and problem has been evident for last 10,000 miles.

While driving at any speed up a hill, the transmission decelerated even when the consumer's foot was on the accelerator, which made the vehicle difficult to control. The vehicle also died on take off. Grommets on lower controls rubbed the torsion bars. While pushing accelerator pedal the consumer had to build up rpms by pressing the gas. The vehicle did not take fuel until the rmps built up when climbing hills.

The vehicle switched from 4 wheel drive to 2 wheel drive with out warning.