One problem related to anti-lock brakes fail has been reported for the 2001 GMC C2500. The most recently reported issues are listed below.
2001 GMC 2500 sierra with 50 k miles, total brake failure!!!, this has happened before 2 times, first under warranty (they balked at fixing) replaced all rotors and calipers, then one month after warranty was out, failure again brake line corrosion from master cylinder to transmission (never seen that before!) cost $250 to fix, then the line behind that, under the fuel tank at 50k miles while 800 miles away in maine on vacation!! nearly killed us! (and others) estimated cost to repair another $500. . . The entire frame and under carriage is rusted to hell! this truck is washed and waxed regularly, and was supposed to be under coated! I have had both front wheel bearing fail at 21k and then again at 35k miles with antilock brake failure as well both times, the bearings $300 apiece and dealer installed. . What next? transmission will not shift when cold, below 50 degrees!! estimated cost to fix this over $1500 just to find out what is wrong. . This truck cost over fifty thousand dollars new and has spent more time parked getting fixed then driving!!! help us please!!!!!!!!!.