2002 GMC Safari Q&A
2002 GMC Safari Question: What caused my power steering and brakes to quit working properly?
Your 2002 GMC Safari van uses the same power assist source for the brakes and the steering - the power steering pump. Make sure nothing has happened to the serpentine belt and the power steering pump pulley is still turning. Check the power steering fluid level. If all the above check out OK then it could be that the pump has failed. - Oakman