One problem related to anti-lock brakes fail 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.
Hit the brakes on my 2003 GMC Sierra 2500hd fairly hard to avoid an accident. I slowed down enough to avert another car, but the anti-lock brakes failed to engage and brake fluid exploded all over my engine. My brakes no longer worked after this initial braking. Pedal went to the floor. Had to use emergency brake to stop and get towed. Very close call.