How much pressure in a gm power steering pump?

The pressure in a GM power steering system varies depending on the model and year of vehicle. Generally, the pressure range for most GM vehicles is between 1000 and 1500 psi (pounds per square inch). Older models may have a pressure range of 800 to 1200 psi. Some high-performance vehicles may have a pressure range of up to 1800 psi. The exact pressure is determined by the power steering pump and the vehicle's specific power steering system.