I was driving at about 30mph, aloud humming noise started, and my ABS light came on.I turned off the ignition, but the noise continued.I found the humming noise coming from under the truck, on the drivers side, under door area.there is a black"box" with 2 electrical plugs.it was necessary to pull one of the plugs to get the humming to stop.but now my ABS light and my brake lights are on all the time on dash.took the truck to original dealership, and was told that the ABS pump and module both went bad.I was told that the cost to repairs would be $1685.66.I just can't believe that both parts went bad.the truck is only 2 years old.now I am driving with my truck in this condition, because I don't have enough available cash on hand to have the repairs done.(2) both drivers side and passenger side windows rattle when they are down.it doesn't matter how far down the windows are.I'm waiting for them to break.it sounds as if they are ready to fall off the track.this has been a problem since I purchased the truck.I told the dealer about it, but nothing was ever done to correct the problem.(3)also, on the front passenger door, there is an air leak when I am driving, again told dealer, and nothing was done.(4)on the third door on right side, rear, water leaks in around glass.took it back to dealer, & was told they couldn't find the reason for the water leak.still continues to leak, when it rains or I wash the truck.another problem I have is with the truck hydroplaneing in the rain.this has also been going on since I purchased truck new in Feb.1999.lost total control on one occasion.truck went completely sideways on roadway.I was traveling at about 50mph.,in a 60mph zone.I was in traffic at the time, the other vehicles around me realzed the situation, and backed off giving me room.when I finally regained control, I pulled off of the highway.I was very badly shaken from the experience (tiresize: P265-75R16)( dot number: Tire size: P265-75R16 )

- Hondo, TX, USA

Initial air leak occurred approximately 1 month after delivery, the window was replaced, and has been replaced 5 other times including next service appointment, in Sept. Or Oct. Of this year a thumping sensation was felt through the steering wheel, after one attempt to service, dealer was unable to reproduce problem, I requested appointment with service advisor in which problem was noticed. I was told it was a lower control arm bushing and that was occurring with the 99 Silverado frequently. With that said the service advisor at parks Chevrolet in beaufort, SC 843-525-4100 stated that both the window would be repaired at the same time the front was repaired; he would order the parts; I have received no calls from the dealer.

- Beaufort, SC, USA

No summary listed for abov evehicle.

- Dimondale, MI, USA

No summary listed for above vehicle.

- Dimondale, MI, USA

Wind noise from flip side windows, clatter underneath chassis when bumps encountered.

- Tigard, OR, USA

Driver's side seat broke four times. When consumer drives and puts on brakes, seat flies forward. When he pushes on the gas pedal, seat flies backward. Tracks are broken, and consumer cannot control vehicle. No accident has yet occurred. Also, windows are loose, dealer has tried to fix several times. Manufacturer has been of no help.

- Yucaipa, CA, USA

Windshield rattles when traveling.

- Pinole, CA, USA

Has been out of service for 15 days in less than 1 yr. Vibrations, comp reprogrammed 2 or 3 times now mileage decreased, clunks from rear end and on left turns, padding in seat failed, rear slider frame cracked and leaks. Dealer got replacement windows but they were cracked too. Still not fixed. Dealer couldn't fix some after repeated tries, had to go to another dealer to finally get some fixed. Side view mirror glass fell out. What's this truck going to be like a year from now?

- Malden, MA, USA

Driving on highway and drive shaft fell off. No warning of problem. Bolts remained in and the shaft just fell out. Tow truck driver said never seen anything like this. 3000 miles on vehicle, bought Aug, 23 1999. Also, had vibration and noise from wind shield, had in shop twice for repair, ended up having to reseal the wind shield, dealer had done 3 simular trucks for the same thing.

- Yuba City, CA, USA

Exhaust: Sounds like exhaust leak when accelerating from approx 4omph, dealer said it was smog pump. Drive shaft: Clunking sound from rear of vehicle on take off, dealer said it was drive shaft and was normal. Transmission: Shifting hard from 1st to 2nd and sometimes to 3rd. Windshield: Clacking noise coming from windshield area at 50+mph. Dealer said it was trim and replaced it 3 times, not fixed.

- Anaheim, CA, USA