GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • SA9149AC-2 Puller Center
    • SA9149AC-3 Drive Plate Installer

Removal Procedure


    Object Number: 893641  Size: SH
  1. Remove the compressor from the vehicle. Refer to Air Conditioning Compressor Replacement .
  2. Using a screwdriver to prevent drive plate from turning, remove the clutch drive plate bolt.

  3. Object Number: 893643  Size: SH

    Important: Be careful not to lose the shims when removing the drive plate from the compressor shaft.

  4. Using a screwdriver with a thin blade, pry the drive plate off of the pulley.

  5. Object Number: 893349  Size: SH
  6. Using external snap ring pliers, remove the snap ring.

  7. Object Number: 893350  Size: SH

    Notice: Do not remove pulley without puller adapter. If A/C compressor shaft is pressed on, A/C compressor will be damaged.

  8. Position the SA9149AC-2 on the end of the A/C compressor shaft.
  9. Important: Ensure to hook the puller jaw behind the pulley only, not the coil.

  10. Install the three-jaw puller on the A/C compressor pulley. Tighten the center bolt to remove the pulley assembly.

  11. Object Number: 893351  Size: SH

    Important: To enable easier removal of screws, lightly tap on the end of the screwdriver with a plastic hammer.

  12. Remove the A/C compressor clutch coil screws and remove the A/C compressor clutch coil.

Installation Procedure


    Object Number: 893351  Size: SH
  1. Position the A/C compressor clutch coil so that the electrical connector is aligned with the indent in compressor front head.
  2. Install the A/C compressor clutch coil screws.
  3. Tighten
    Tighten the A/C compressor clutch coil fasteners to 5 N·m (44 lb in).


    Object Number: 893355  Size: SH
  4. Place the thrust bearing and the SA9149AC-3 on the installation bolt and insert through the center of the pulley. Thread the installation bolt into the end of A/C compressor shaft and hand tighten.

  5. Object Number: 893358  Size: SH
  6. Hand tighten nut on the installation bolt to align the pulley to the A/C compressor. While holding the end of bolt, tighten the nut until the pulley bottoms out on the A/C compressor.
  7. Loosen the nut and remove the pulley installation bolt.

  8. Object Number: 893349  Size: SH
  9. Install the snap ring with the tapered side out using the snap ring pliers.

  10. Object Number: 893644  Size: SH
  11. Install the shims removed from the old drive plate into the clutch drive plate and install it onto the compressor shaft.

  12. Object Number: 893641  Size: SH
  13. Install the drive plate bolt.
  14. Using a screwdriver to hold drive plate, tighten the drive plate bolt.
  15. Tighten
    Tighten the A/C compressor clutch plate bolt to 12 N·m (9 lb ft).


    Object Number: 893645  Size: SH
  16. Using a feeler gage, inspect to ensure the clearance is 0.3-0.6 mm (0.012-0.024 in).
  17. If necessary, adjust the clearance by adding shims provided with the clutch. Refer to drive plate removal procedure to remove drive plate. After installing the shims, re-install the drive plate and verify the proper clearance.