1989 GMC R3500 Sierra Classic 8 Cyl 7.4L
Steering & Suspension
Hydraulic brake booster or power steering pump help!
im trying to decide witch is not working .the Hydraulic brake booster has a little canister thing on it that says compressed air tha moves and i dont think it should.it leaks a little but im not sure if it enough to cause the problem. the problem is that there is no power steering and the brakes dont stop the truck very good.
Replace the power steering pump.