One problem related to brake antilock wheel speed sensor 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.
1) abs speed sensor corrosion causing an unsafe braking situation at speeds below 10 mph. 2) failure occurs every braking situation when below 10 mph 3) 2003 model year not included in current recall by GMC .