One problem related to starter has been reported for the 2003 GMC Sierra. The most recently reported issues are listed below.
The speedometer on many of the 01-06 model GMC/chev trucks including my 2003 GMC Sierra will go out. The failure starts with the speedometer sticking 20-30 mph high and will function correctly with that delta. Eventually this delta will grow and can only be reduced by starting the engine repeatedly. The speed will go down by a constant 5 mph each time you restart but this will eventually lead to burning a starter. This also leaves the driver to guess what the correct delta is. This morning the speedometer continued to climb even though I was going a constant 30 mph on a city street. I know this because I was spoke a friend that is a county sheriff that was clocking traffic at the time. The speedometer continued to climb up to the limit speed of 120 mph while I was still going 30 mph. The speedometer eventually passed 120 mph and rested at 245 degrees from the 0 position. This left me with zero speed indication whether it be a delta or true. This was a significant safety event and I didn't feel very safe driving the vehicle this way. After I arrived at work I began searching the web to find a solution, and that I did. I have found hundreds of people that have had the same problem in many GMC/Chevrolet trucks. . Read more...