general problems of the 2003 GMC Sierra 2500

Ten problems related to electrical system have been reported for the 2003 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Sierra 2500 based on all problems reported for the 2003 Sierra 2500.

1 Electrical System problem

Failure Date: 03/28/2019

Blower motor resistor does not operate. Upon inspection, harness and final stage are damaged due to excessive heat. I need to replace both components because I fear it will cause a fire. Many posts on the same thing. Why is there nothing done about this? my BMW had same issue but it was a recall on their cars. Why is it not a recall on gm? is it because they are an american car company?.

2 Electrical System problem

Failure Date: 05/01/2014

When placed in park then turned off the key wouldn't come out of the ignition, when placed in drive while running the key would come out freely.

3 Electrical System problem

Failure Date: 10/02/2010

The contact owns a 2003 GMC Sierra 2500 hd. The contact was driving approximately 55 mph when the speedometer began to inaccurately read a speed of 90 mph. The contact shut off the vehicle and when restarting, the speedometer was still reading inaccurately. The vehicle was not taken to be examined for the cause of failure and was not repaired. The failure and current mileage was 100,000.

4 Electrical System problem

Failure Date: 10/01/2010

GMC 2500 diesel hd sle sierra rearwheel drive instrument panay is inoperative. Have to use iphone for speed and guess at gas effecting cruise control interior lights fan speed and cd player.

5 Electrical System problem

Failure Date: 08/01/2010

Speedometer began to register innacurately then stopped working completely.

6 Electrical System problem

Failure Date: 01/27/2010

My speedometer on my 2003 Sierra 2500hd became erratic and then stuck at about 140 mph and stayed there.

7 Electrical System problem

Failure Date: 10/07/2008

The contact owns a 2003 GMC Sierra 2500. While driving less than 45 mph, the speedometer displayed 120 mph. The contact shut off the vehicle and restarted it to see if the speedometer would reset itself. The vehicle was taken to the dealer, but they would not perform repairs because it was not covered under the warranty. The failure and current mileages were 104,571.

8 Electrical System problem

Failure Date: 08/15/2008

Gauges stopped working. No lights, no odometer, no information at all.

9 Electrical System problem

Failure Date: 03/17/2006

2003 GMC 2500 hd 6. 0l has an erratic speedometer that is a safety issue.

10 Electrical System problem

Failure Date: 03/12/2006

2003 GMC Sierra 2500hd w/duramax trans speedometer failure in reading accurate speeds stuck at 120 mph perhaps leading to trans failure/ leaking fluids due to improper shifting.


Other Electrical System related problems of the 2003 GMC Sierra 2500


Safety Ratings of Sierra 2500 Cars
Sierra 2500 Service Bulletins
Sierra 2500 Safety Recalls
Sierra 2500 Defect Investigations