One problem related to brake hoses, lines/piping, and fittings has been reported for the 1996 GMC Jimmy. The most recently reported issues are listed below.
Brake pedal went to floor, pumped brakes, returned to normal. Further down road, pedal again went to floor, vehicle spun around, could have caused crash, according to dealer, water got into brake line; also all wheel driveshaft locked, causing front tires to lock up. Consumer states tires locked up about 4 or 5 times which caused vehicle to veer from lane to lane.