Drain and Refill System

The power steering fluid replacement procedure is a two-stage process: first, flushing the old fluid from the system with new fluid; and second, bleeding the system to remove any trapped air. The following two sequences outline the steps in each procedure.
1. Raise the front end of the vehicle off the ground until the wheels are free to turn. Refer to VEHICLE LIFTING.
2. Remove the fluid return line at the pump reservoir inlet connector.
3. Plug the inlet connector port on the pump reservoir.
4. Position the power steering fluid return line toward a large container in order to catch the draining power steering fluid.
5. While a second person fills the reservoir with either standard power steering fluid GM specification 16 ounce or 32 ounce or optional cold climate power steering fluid GM specification 16 ounce or 32 ounce, start and run the engine at idle.
6. Turn the steering wheel from stop-to-stop.

NOTICE: Do not hold the wheel against stops while flushing the system. Holding steering wheel against wheel stops will cause high system pressure, overheating, and damage to the pump and/or gear.

7. Continue draining until all of the old power steering fluid is cleared from the power steering system. Addition of approximately 0.946 Liters (1 quart) of new power steering fluid will be required to flush system.
8. Unplug pump reservoir inlet and reconnect return hue.
9. Turn engine off, and fill reservoir to the FULL COLD mark.
10. Continue with BLEEDING POWER STEERING SYSTEM.