GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Notice

Do not raise the engine block by the crankshaft balancer to perform this service procedure. Damage to the crankshaft balancer or the crankshaft may occur.


    Object Number: 524280  Size: SH
  1. Disconnect the battery negative cable from the battery.
  2. 1.1. For the front battery, refer to Battery Cable Replacement in Engine Electrical.
    1.2. For the auxiliary battery, refer to Battery Cable Replacement in Engine Electrical.
  3. Remove the engine cover from the vehicle. Refer to Engine Cover Replacement in Body and Accessories.
  4. Raise the vehicle and support with safety stands.
  5. Remove the transmission assembly from the vehicle. Refer to Transmission Replacement in Transmission/Transaxle.
  6. Remove the oil pump mounting bolts.
  7. Remove the oil pump assembly from the crankshaft rear bearing cap.

Installation Procedure

Important: When servicing the oil pump assembly, always replace the retainer between the oil pump hex drive and the oil pump.


    Object Number: 524280  Size: SH
  1. Prime the oil pump assembly.
  2. 1.1. Submerge the oil pump in a container with clean motor oil.
    1.2. Rotate the oil pump hex drive by hand until the oil begins to flow from the oil pump assembly.
    1.3. Clean the excess motor oil from the outside of the oil pump assembly.
  3. Install a new retainer between the oil pump and the hex drive shaft.
  4. Align the extension shaft with the drive shaft to the oil pump drive gear. the oil pump should slide easily into place, do not force the oil pump into place.
  5. Install the oil pump and the extension shaft to the crankshaft rear bearing cap.
  6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Install the oil pump mounting bolts to the oil pump.
  8. Tighten
    Tighten the bolts to 90 N·m (65 lb ft).

  9. Install the oil pan to the engine block. Refer to Oil Pan Replacement .
  10. Install the transmission assembly in the vehicle. Refer to Transmission Replacement in Transmission/Transaxle.
  11. Remove the safety stands and lower the vehicle.
  12. Connect the battery negative cables to the batteries.
  13. • For the front battery, refer to Battery Cable Replacement in Engine Electrical.
    • For the auxiliary battery, refer to Battery Cable Replacement in Engine Electrical.
  14. Install the engine cover in the vehicle. Refer to Engine Cover Replacement in Body and Accessories.