2007 Cadillac Escalade ESV Power Steering Reservoir

You can raise the vehicle until the front wheels are off the ground. Key on the engine OFF, and turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer-length power steering hoses may require turns up to 15 to 20 stop to stops. Then you can verify the power steering fluid level per operating specification, start the engine, rotate the steering wheel from left to right, check for signs of cavitation or fluid aeration (pump noise/whining), verify the fluid level, and repeat the bleed procedure, if necessary.

You need to drain the power steering fluid from the power steering pump and remove the pump mounting studs, the connector and fitting assembly, and the O-ring seal. If replacement is required, remove the control valve assembly and the flow control spring from the pump housing assembly, the reservoir assembly from the pump housing assembly, the O-ring seals, and the magnet, and clean the magnet. Then you can inspect the welch plug in the power steering pump housing. If the welch plug is deformed or dislodged, replace the power steering pump housing.

You need to lubricate the O-ring seals with power steering fluid, install the flow control spring to the pump housing assembly, the control valve assembly to the flow control spring, the O-ring seals to the pump housing assembly, and the magnet to the pump housing assembly, connect the reservoir assembly to the pump housing assembly and install the O-ring seal, the connector and fitting assembly to the pump housing and the pump mounting studs to the pump housing and then tighten the connector and fitting assembly.