Oil Pump Replacement for GMC Truck Sonoma Pickup - 2WD 2001

1. Remove the engine oil pan. Refer to Oil Pan Replacement .



2. Remove the oil pump drive bolt.
3. Remove the oil pump drive. Do this by lifting and turning the oil pump drive.



4. Remove the bolt that attaches the oil pump to the rear main bearing cap.
5. Remove the oil pump.



6. Remove the oil pump drive shaft.

Important: Do not crack the oil pump drive shaft retainer.

7. Remove the oil pump drive shaft retainer.




Important: A loose oil pump tube can cause an air leak and a loss of oil pressure.

8. Inspect the oil pump pickup tube for looseness.
9. Clean and inspect the oil pump. Refer to Oil Pump Cleaning and Inspection in Engine Mechanical-2.2 L (L 43) Unit Repair.
10. Inspect the mating surfaces between the engine and the oil pump.

It must be clean and free of burrs.

1. Install the oil pump drive. Do this by twisting the oil pump drive into place.

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.

2. Install the oil pump drive bolt.

Tighten
Tighten the oil pump drive bolt to 25 N·m (18 lb ft).




3. Heat the oil pump drive shaft retainer in hot water.
4. Install the oil pump drive shaft retainer on the oil pump drive shaft.




Important: Do not crack the oil pump drive shaft retainer when installing the oil pump drive shaft.

5. Install the oil pump drive shaft into the oil pump.



6. Install the oil pump.
7. Install the bolt that attaches the oil pump to the rear main bearing cap.

Tighten
Tighten the bolt that attaches the oil pump to the rear main bearing cap to 43 N·m (32 lb ft).

8. Install the engine oil pan. Refer to Oil Pan Replacement .