One problem related to brake disc pads has been reported for the 1998 GMC Savana. The most recently reported issues are listed below.
Brakes are pulling to the left. Noise coming from front left disc. Took it to the dealer 3 times. They made it worse, they turned the rear drums and the front disks and replaced pads, now braking distance is significantly increased, car pulls to the left, rear wheels abs don't work.