That is the ABS activating because one of the wheel speed sensors is not reading accurately at low speeds and the computer reads that as a brake locking up. This is a pretty common problem on these trucks and there are a number of TSBs on the subject noting various causes like bad wheel bearings, damaged or rusted tone rings or bad sensors. It can even be a mismatch in tire size. It needs to be diagnosed by a knowledgeable technician.
Thursday, September 16th, 2010 AT 11:55 AM