The automatic 4 wheel drive shifts from 2 wheel high to 4 wheel low while driving. I have replaced encoder once and now does it again. This not uncommon in Chevy P/U's. was told by service writer this happened to a truck while it was going down road at 70mph and it destroyed power train. The person was lucky that they had their seat belts on. Problem # 2 is sometimes the speedometer works and sometimes it does not another common defect. When I worked for a plumbing company they had this some of their trucks. I also talked to a former GM mechanic and he said that these problems were common with Chevy trucks. There are recalls for hub caps and lights but not for something as serious as these 2 defects. How long before someone is injured or dies before this is corrected?

- Henderson, NV, USA

2005 Chevrolet Silverado. Consumer states transmission failed. The dealer replaced the input clutches in the transmission.

- Burlington, NJ, USA

Defective encoder motor.

- Orangeburg, SC, USA

Shift indicator, does not light up, various panel lights flash off/on when driving at night, transmission with only 97,000 miles. Google searched alot of same type vehicles have this problem. Do not know what gear its in.....transmission went out going down highway had to pull off.....also service airbag light came on......too many things going wrong for a newer vehicle, truck is taken care of very well...

- Burnham, IL, USA

Auto transmission only works in 1st and 2nd gear. Load noises from transmission. Replacing transmission now. Cost not known yet. There should be a recall. After minimal research on internet, it is easy to see many issues with Chevy transmissions.

- Stafford Springs, CT, USA

Just bought my 2005 Chevrolet Silverado 24 hrs ago. Speedometer went out. Reads 120 at all times. This is very dangerous, also illegal. Something needs to be done to resolve this issue. GM should have quality product !

- Dover, DE, USA

My 2005 Chevrolet Silverado 1500 with less than 70,000 miles my transmission went out, it started with a little slip then worked fine but the next week it went out completely. The transmission was full of fluid and never leaked.

- Sugar Tree, TN, USA

My 2005 Silverado Z71 has a loud grinding noise coming from the front differential when it is in 4 wheel drive. This car has been serviced regularly, however I have only had this vehicle in 4wheel drive 5 times since I have owned it(new). The potential repair is in excess of $1000, because I have been told that it is in the front transfer case because the noise is not there in 2 wheel drive. Can you please help me. Has this happened to many Silverado owners.

- Florence, KY, USA

While driving down the interstate, my truck would not go into overdrive. A little farther down the road, while shifting into 3rd gear the truck would slip into gear. Eventually 3rd, 4th and od went out, the only gears that worked are 1st and 2nd. The dealer said it would cost over $2500 to rebuild because of the damage or replacement would cost $2800. The truck only had 85000 miles on it.

- Oxford, GA, USA

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 was driving 55 mph on a state highway when the engine started revving up. The transmission quit while driving down the highway with only 63,000 miles the transmission would engage but would slip out of gear around 45 mph the dealer replaced the transmission at a cost of $2700. Took 3 days 18000 miles later driving down a country road the transmission quit again. I was able to limp it home (60 miles) in first gear. The dealer said it was a rare occurence. The dealer rebuilt the transmission free of charge but it took 11 days the dealer said forward spring assembly broke?

- Auburn, IN, USA

The contact owns a 2005 Chevrolet Silverado 1500. While driving at an unknown speed, the vehicle would not shift into third gear and the instrument panel was blank. The dealer stated that the transmission and instrument panel failed. The dealer was willing to replace the instrument panel for free, but the transmission would be the contact's responsibility. The contact referenced technical service bulletin number 10025462 (power train:automatic transmission). The current and failure mileages were 74,000. Updated 11/10/08 the speedometer failed 2 days prior. Updated 11/13/08.

- Zebulon, GA, USA

I was on my way to work and I stopped at a stop sign and happened to look down at my speedometer and it was showing that I was going 10mph while I was sitting still. Then while I was driving the speedometer jumped to 85mph. This was the first time I have noticed this problem.

- Greenwood, DE, USA

The contact owns a 2005 Chevrolet Silverado 1500. While driving 15 mph the automatic transmission would not shift into second gear. The dealer stated that the problem could be assembly debris in the transmission. The dealer did not make the repair. The contact stated that they refused to repair under warranty. The failure mileage was 1,100 and the current mileage was 1,248.

- Mingoville, PA, USA

- - the contact has a 2005 Chevrolet Silverado. The consumer experienced difficulty in steering and, getting into gear once it was at a complete stop. These symptoms began after the vehicle's odometer reached 5000 miles. The contact purchased the vehicle in 7/2005 and is the original owner. The contact has taken the vehicle to 3 separate dealerships in regards to these issues. After test driving the vehicle the mechanic agreed that there were failures with the transmission and steering that were noticeable while driving the vehicle. However, once they ran diagnostic tests the report showed that no errors existed.

- Sacramento, CA, USA

Automatic transmission at times hesitates before engaging when accelerator is pushed when vehicle is starting a complete stop. It has happened at least three times - the last being the date listed below.

- Anderson, IN, USA

Catastrophic automatic transmission failure at 68,128 miles. Independent repair facility repaired transmission. I have retained the failed component.

- Pittsburgh, PA, 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

: the contact stated upon accelerating at low speeds from a stop, the automatic transmission hesitated without warning. The vehicle was inspected by a dealer who was unable to duplicate the problem. The manufacturer was not contacted.

- Covington, GA, 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