How much pressure does a GM power steering pump put out?
How much pressure does a GM power steering pump put out? At idle with the steering wheel static, a typical power steering pump holds about 80 to 125 psi in the output line. How do I increase the pressure on my GM power steering pump? You should see some shims under the head of the screw. You might try unscrewing it and removing one shim. One shim should raise the pump relief pressure by 100 to 200 psi. Hold the plunger in a vise that has “soft jaws” or hold it between two pieces of wood when you remove the...