One problem related to brake electric antilock has been reported for the 2003 GMC Safari. The most recently reported issues are listed below.
At irregular times when driving at slow speeds (~10 mph), on dry clean pavement, and under light to moderate braking, the anti-lock braking system engages and extends the stopping distance of the vehicle. I understand that a recall was issued for other vehicles in other states, but obviously the problem extends to more year models and over a wider area. In addition, gm has issued a technical service bulletin #02-05-25-006a covering more vehicles than were in the initial recall for this failure. It seems that if a TSB was released, they are aware that the problem is on much wider scale than the recall indicates.