definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
29,251 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2005 GMC Sierra 2500 electrical problems

electrical problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2005 GMC Sierra 2500:

Unsubscribe any time. We don't sell/share your email.

2005 GMC Sierra 2500 Owner Comments

problem #6

Sep 052016

Sierra 2500

  • 55,000 miles


The speedometer is failing. It works erratically. It eventually goes to zero and stays there until I stop and restart the truck or let it sit overnight.

- Loma, CO, USA

problem #5

Apr 052010

Sierra 2500

  • miles
Fuel gage, speedometer broken, oil gage, battery indicator etc all stopped working. Also steering column has been fixed three times and broke again.

- Ninety Six, SC, USA

problem #4

Jan 012009

Sierra 2500 8-cyl

  • 50,000 miles
I bought my GMC Sierra 2500 in June of 2005. Shortly after I bought the truck I started to notice rust on the trailer hitch and frame rails. As the years have gone by, the entire undercarriage is rusted over. Over the last several years a brake line rusted through and the brake pads & rotors have been replaced several times. I was lucky to be picking my truck up from the shop after an oil change & not driving it, when I noticed brake fluid on the ground under my truck.my speedometer does not work properly & the dashboard lighting works occasionally. My trailer hitch rusted so bad that the last time I put the receiver into the hitch it was stuck & I had to get a friend to connect a chain to his truck & while I drove forward & he reversed, the receiver finally broke free after approx. 10 minutes.

- Bel Air, MD, USA

problem #3

Apr 012014

Sierra 2500 8-cyl

  • 49,890 miles


Lass then 50000 mil the speedometer stop working it need a new ( instrument panel )

- Boise, ID, USA

problem #2

Jun 042012

Sierra 2500

  • miles
The contact owns a 2005 GMC Sierra 2500 hd. The contact stated that the speedometer would not provide accurate speed rates. The speedometer would read that the contact was traveling 120 mph when the contact was actually traveling 60 mph. The contact had not taken the vehicle to the dealer for inspection or repairs. The current mileage was 102,000 and the failure mileage was unknown.

- Cinncinatti, OH, USA

problem #1

Jul 092010

Sierra 2500

  • 20,615 miles
2005 GMC 2500hd pickup truck, HVAC blower speed controller/relay connector got hot, burned out connector and wire, lots of smoke. It happened when turn fan to high. The failure was due to contact resistance at the connector. The wire harness end is tinted copper, the relay/controller connector is bare metal. Due to galvanization of different metal in the connection system, the connector is undersize for the black wire, which is the return current because the blower assembly is plastic. The resistance between the contact point of the connector act as heater and got hot, burn out connection and connector housing. The speed control unit, which composed of few power resistor is mounted in the air stream that it will collect vapor water due to condensation when ac is in used. This cause corrosion in the speed controller/relay board. The work around is bypass the connector by shorting the black wire from the blower motor to the black input wire that burned out. Cut the input black wire, wire nut it together with a 12 awg jumper wire, cut the black wire at the blower motor, wire nut it to the other end of the jumper wire. After the jumper put in, blower fan works in all speed and no smoke from connector and wire.

- Mayfield Heights, OH, USA

Not what you are looking for?