One problem related to rear window wiper washer has been reported for the 1996 GMC Safari. The most recently reported issues are listed below.
Intermittently rear windshield wipers become inoperable, obstructing driver's view. The accelerator cable was replaced twice. The alternator was replaced three times. The water pump was replaced twice. The driver's side power window motor was replaced and the passenger side needs to be replaced. The driver's side seat motor failed. The hatch failed. The rear captain chairs seat belts broke.