One problem related to brake disc caliper has 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.
Ii put new brake calipers on my truck today and had my wife pumping the brake peddle as I bled the brakes and got to the last caliper rears then the 2 fronts when she told me the brake peddle was not holding like it was , and then smoke came out from under the truck and I looked underneath & seen brake fluid everywhere below drivers door the fluid under pressure blew over against the hot engine componets as u have to run engine when bleeding the lines lucky I guess it did not catch fire, but after I got on the internet trying to find a replacement I found that is a common problem , I did see the other lines looked bad also the fuel lines looked the same good thing it happened in the driveway at home . Maybe would have been better off if it burnt down , g. M should fix all of these problems with these trucks on their dime as much as these trucks cost. !!.