Problems with 2005 GMC Sierra 1500 ELECTRICAL SYSTEM

There is a known issue with gmc vehicles where the odometer quits working after 70,000 miles. there is, i believe, a recall on the 2003/2004 model year. i have a 2005 gmc pickup that has the exact same part in it as is also defective. it gives inaccurate readings or pegs at 120 or 0. this is very dangerous. if it wasn't so expensive, i'd fix it myself. but this is a defective part put in the vehicle by gm and should be fixed by gm. *tr

The speedometer has been erratic for the last 2k miles but now at 43k miles has completely died. *tr

Speedometer has quit working properly. it sometimes reads inaccurately low and sometimes inaccurately high. it will usually go several weeks without ever working properly and then will work for a few days. it sometimes never comes back down after peaking at the maximum speed. *tr

I was driving my 2005 gmc sierra 1500 truck and the cab filled with smoke the a small fire developed on the wire bundle that connects to the fan blower under the dash passenger side. i had to pull over and pry the burnt connector off of the resistor / blower hook up. the fuse did not work and the connector continued to burn until i shut off the truck and remove the connector. i plan to take the truck into skillman gmc since a fuse did not blow prior to the burning of the wiring. also i did a brief search and found others had similar issues with either the gmc sierra and the chevy silverado truck. *tr

I own a 2005 gmc sierra and the speedometer has failed. i own a gps so i use this to help determine the speed i am traveling. i brought my vehicle into the dealer on several occasions and contacted gm and they stated they could not help me that i would have to pay $380.00 to get it repaired. two days after bringing into my local dealer i received a letter in the mail stating there was a class action lawsuit against gm for defective speedometers on certain makes and models. *tr

Speedometer stopped working. would manifest itself in a couple of ways. 1) it would show a steady speed of 25 mph regardless of my actual speed. 2) would show i am going as much as 50mph over my actual speed. *tr

Speedometer not working correctly, only have 48,000 mile on vehicle ,sometimes it works fine other times it may stick on 50 or 60 or may not work at all. if it sticks on 50 for example when i start my next trip it starts at that point,if i'm going 20 mph it says i'm going 70 mph,ect. *tr

Tl*the contact owns a 2005 gmc sierra 1500. while driving at any rate of speed, the speedometer displays inaccurate readings. the vehicle has not been taken to the dealer. the current and failure mileages were 105,000.

The instrument cluster panel on my 2005 gmc sierra pick up constantly reads the wrong speed. at times it registers 0 mph when im actually driving. *tr

The speedometer failed after 60,000 miles. *tr

Truck is now 6 years old, just over 70,000 miles. 3 to 4 years ago (maybe more) the #5 speed on the air system blower stopped working. perhaps last summer or fall, i checked the fuses: all good. i finally found the wiring harness plug to the fan and found the #5 line had melted insulation and the surface of the contact prongs blackened. i sanded them and reinstalled the plug. all speeds worked, for a while, but soon became intermittent. then all speeds stopped working totally. at last, i remembered that i still had an extended warranty with mastertech, checked it and was able to get the harness replaced under the warranty. the workman who did the repair said that this item was a common problem with the 2005 sierra. while i do now have a working fan control, i am afraid to use the #5 fan speed. *tr

Tl* the contact owns a 2005 gmc sierra 1500. while driving approximately 65 mph, the contact noticed that the speedometer was not providing a reading. the dealer was made aware of the failure and the technician stated that the instrument cluster would have to be replaced. the vehicle was not repaired. the approximate failure mileage was 50,200.

Fan speed 5 will not work and speed 4 smell like burning wires, drivers temp control will not work only cold air. connector under passenger side fan black wire burned into and melted connector. gmc parts man said there was a national backorder on parts because so many wes go bad. *tr

2005 gmc sierra - if the vehicle sits for 3-4 days without being driven, the battery goes dead. nothing has been left on. *jb

Electrical system, all my truck lights dim very low when i roll the windows up or down when driving, when i hit the brakes all lights dim and vot. drops we have taken it in to the shop a lot for this and still no fix. service engine light stays on and my temperature gauge doesn't work i took it in and they said this problem is only in alaska and there is no fix. front diff has been a problem since the day we picked it up the have fixed different things on it. *jb