The contact owns a 2005 Chevrolet Silverado diesel engine. While driving at speeds as low as 50 mph, the vehicle speedomoter would indicate the vehicle was traveling at speeds of 120 mph and would stick at this mileage. The vehicle was taken to the dealer, however no repairs were made to the vehicle. The contact was not present at the time the vehicle was taken to the dealer and was unsure as to what was advised in reference to the vehicle. The failure persisted. The failure and current mileages were 96,000. Updated 06/02/10. The consumer was informed the problem was caused by a wiring cluster in the dash. Updated 06/28/10

- Hidden Valley Lake, CA, USA

2005 Chevy 2500 diesel truck has a fuel injector problem caused by a short in the electrical wiring due to fraying of the wire bundle. The consumer stated the vehicle developed a loud knock in the engine during warm-up and while driving. The knock was intermittent. The consumer stated if fraying on the outside of the wire bundle harness was evident it could be re-wrapped and re-routed. It currently is attached to a very sharp post on the engine manifold with a nylon pull tie. As the motor runs, the wire rubs against a sharp edge of the post and frays which can cause a short and make the fuel injector misfire.

- Yukon, OK, USA

Electrical/instrument cluster/SDM- first reported service air bag light on at 65,000 mile's scanned system found fault in SDM and wiring given estimate of $825 for repairs, at 84,000 whole instrument panel/speedometer/radio went on/off repeatedly while driving. Scanned system found fault in wiring and SDM, I have had no air bags/speedometer/instruments for 18 months. Very unsafe in mi.

- Frederic, MI, USA

I am registering this complaint because it is a safety issue. I own a 2005 Chevy Silverado with 15,000 miles with brake lights which frequently fail to function. I checked the problem myself and found there was a connection issue. When it continued to occur I took the truck back to the dealer (11/15/07) requesting a different design which I believe is the only way to correct this problem. They lubed the sockets with dielectric grease and they are already out again. They told me they had no other design to fix this problem. When my brake lights fail to work, unless someone alerts me, I am unaware of this issue. Is this something which can be corrected? it truly is a safety issue.

- Rotonda West, FL, USA

During a routine morning commute, I noticed the check engine light had illuminated. Immediately following the malfunction, I noticed a severe decrease in engine power and the engine started to vibrate and mis-fire heavily. I was in heavy traffic and had to pull off of the road to avoid a potential accident situation. I then shut the truck off, and re-started the vehicle to possibly re-set the light. The engine started and seemed to run smoothly again, but the light stayed illuminated. It was 7am, so I decided to very slowly drive to the dealership where I had purchased the truck. The technician performed a diagnosis, and found a hard code of P2146 insulate ficm. I was then told that the main fuel injector system wiring harness had chaffed on a factory installed bracket and that it would need to be replaced. I was then told that they did not have the parts in stock, and that I would have to wait for one week to have the parts replaced. In the meantime, the technician stated that he had "insulated" the harness, and that the light was out. He stated that I should be able to drive the truck without any issues, but if the check engine light comes on again and I also receive a "low power" message on the annunciator panel in the dashboard, that I must park the truck and get a rental vehicle until the parts arrive and repairs can be made. The technician stated that this would cause four of the eight cylinders to shut down and cause a lean engine fuel condition which could result in engine failure. As of yet, parts to be replaced within one weeks time.

- Rising Sun, MD, USA

: the contact stated that the vehicle stalled intermittently while driving 50-60 ph. This happens without warning. The vehicle was taken to a dealership but they were unable unable to duplicate the problem. The contact believes this is an electrical or engine problem. Updated 2/28/2006 - the consumer smelled something burning and the vehicle would not start. The vehicle continued to blow fuses. The technician found a shoted wire under the steering column.

- Garrison, KY, USA