For 1990-2009 cars

## Power Steering Pump Assemble L81

1. Lubricate the new drive shaft seal with power steering fluid GM P/N 9985010.
2. Install a new drive shaft seal into the pump housing using a suitably sized socket as a driver.
3. Install the thrust plate and pump rotor onto the drive shaft.
4. Install anew shaft retaining ring onto the drive shaft.
5. Install the drive shaft, rotor, and thrust plate assemblies into the housing.
6. Install the pump ring dowel pins into the pump housing through the thrust plate.

Important: The pump ring face has an indentation on one side near the dowel hole. The ring must be installed with the indentation facing up. If the ring is installed upside down, the pump will not function.

7. Install the pump ring, with the holes correctly positioned onto the dowel pins, into the housing.
8. Install the vanes into the pump rotor. Vanes have a radius at both ends and may be installed in either direction.
9. Lubricate the new pump housing O-ring with power steering fluid and install it into the groove in the housing.
10. Align the pressure plate dowel holes with the dowel pins and install the plate into the housing.
11. Position the pressure plate spring against the pressure plate. The spring may be installed in either orientation.
12. Lubricate the new end cover O-ring with power steering fluid GM P/N 9985010 and install it onto the end cover.
13. Lubricate the outer edge of the end cover with power steering fluid GM P/N 9985010.
14. Press the end cover into the pump housing.

Important: Make sure the retaining ring is fully seated in the housing groove. If difficulty is encountered, use a press as shown or a C-clamp, one side on the end cover, the other on the pump drive shaft, to depress the end cover, easing installation to the retaining ring. Make sure to insert a piece of wood or other protective material, between the C-clamp and the pump drive shaft.

15. Install the retaining ring into the groove in the pump housing, with the ring opening near, but not across, the access hole in the housing.
16. Install the pump pulley hub using the SA9162C-2 or equivalent.

## Power Steering Pump Assemble L61

1. Lubricate the new drive shaft seal with power steering fluid GM P/N 9985010.
2. Install a new drive shaft seal into the pump housing using a suitably sized socket as a driver.
3. Install the thrust plate and pump rotor onto the drive shaft.
4. Install a new shaft retaining ring onto the drive shaft.
5. Install the drive shaft, rotor, and thrust plate assemblies into the housing.
6. Install the pump ring dowel pins into the pump housing through the thrust plate.

Important: The pump ring face has an indentation on one side near the dowel hole. The ring must be installed with the indentation facing up. If the ring is installed upside down, the pump will not function.

7. Install the pump ring, with the holes correctly positioned onto the dowel pins, into the housing.
8. Install the vanes into the pump rotor. Vanes have a radius at both ends and may be installed in either direction.
9. Lubricate the new pump housing O-ring with power steering fluid and install it into the groove in the housing.
10. Align the pressure plate dowel holes with the dowel pins and install the plate into the housing.
11. Position the pressure plate spring against the pressure plate. The spring may be installed in either orientation.
12. Lubricate the new end cover O-ring with power steering fluid GM P/N 9985010 and install it onto the end cover.
13. Lubricate the outer edge of the end cover with power steering fluid GM P/N 9985010.
14. Press the end cover into the pump housing.

Important: Make sure the retaining ring is fully seated in the housing groove. If difficulty is encountered, use a press as shown or a C-clamp, one side on the end cover, the other on the pump drive shaft, to depress the end cover, easing installation to the retaining ring. Make sure to insert a piece of wood or other protective material, between the C-clamp and the pump drive shaft.

15. Install the retaining ring into the groove in the pump housing, with the ring opening near, but not across, the access hole in the housing.
16. Lubricate the new end cover O-ring seal with power steering fluid GM P/N 9985010 and install the O-ring onto the reservoir.
17. Install the reservoir into the pump housing. Make sure to push the reservoir straight into the housing.
18. Install the reservoir retaining clips.
19. Install the pump into the vehicle as described in the next section. Bleed the system. Refer to Power Steering System Bleeding .