1989 gmc seirra k1500February 5, 2015power steering pump quits working Keywords:Sierra 1 thought on “1989 gmc seirra k1500” Freeautomechanic February 5, 2015 at 5:27 pm Check the power steering fluid level first. If it is making a whining noise and the fluid level is full, your power steering pump is bad and will need to be replaced. Does it work at all and just sometimes it quits? Check the Belt? Comments are closed.