For 1990-2009 cars

## Oil Pan Replacement Lower

### Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the 4 splash shield bolts.
3. Remove the splash shield.
4. Drain the engine oil.
5. Disconnect the oil level sensor connector.
6. Remove the oil level sensor wire electrical connector C-clip (1) from the upper oil pan.
7. Remove the lower oil pan bolts.
8. Remove the lower oil pan from the upper oil pan.
9. Pull the oil level sensor electrical connector from the upper oil pan.
10. Remove the oil level sensor bolts (if applicable).
11. Remove the oil level sensor from the oil pan (if applicable).
12. Clean the oil pan.
13. Clean the oil pan gasket surfaces.

### Installation Procedure

1. Install the oil level sensor to the lower oil pan (if applicable).

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 level sensor bolts (if applicable).

Tighten
Tighten the oil level sensor bolts until fully seated and not stripped.

3. Install the oil pan gasket.
4. Install a new oil level sensor connector O-ring and lubricate with engine oil.
5. Support the lower oil pan.
6. Install the oil level sensor electrical connector through the upper oil pan and retain with the C-clip (1).
7. Install the lower oil pan to the upper oil pan.
8. Install the lower oil pan bolts.

Tighten
Tighten the oil pan bolts to 8 N·m (71 lb in).

9. Connect the oil level sensor electrical connector.
10. Install the splash shield.
11. Install the 4 splash shield bolts.

Tighten
Tighten the splash shield bolts until fully seated and not stripped.

Do not strip the splash shield bolts.

12. Lower the vehicle.
13. Refill the engine oil. Refer to Approximate Fluid Capacities .

## Oil Pan Replacement Upper

#### Tools Required

• | J 28467-A Engine Support Fixture

• | J 28467-450 Engine Support Fixture Adapter

• | J 36857 Lift Brackets

### Removal Procedure

1. Remove the lower oil pan. Refer to Oil Pan Replacement .
2. Remove the engine mount lower nuts from the frame bracket.

Note the orientation of the alignment tab (1).

3. Remove the A/C compressor hose strap bolt from the front of the upper oil pan.
4. Remove the four transmission bolts from the upper oil pan.
5. Remove all but the four corner upper oil pan bolts.
6. Match mark the propeller shaft to allow for correct realignment.
7. Remove the propeller shaft bolts.
8. Slide the propeller shaft rearward, away from the transmission.
9. Secure the propeller shaft in place.
10. Remove the catalytic converter hanger bolts (1) from the hanger bracket (2).
11. Remove the catalytic converter nuts from the exhaust manifold.
12. Lower the catalytic converters and secure with mechanic wire.
13. Remove the two idler arm bolts from the frame and lower the relay rod out of the way.
14. Lower the vehicle.

Important: When raising the engine, use care so as not to damage surrounding components and/or attachments to the engine.

15. Use the J 28467-A , the J 28467-450 and the J 36857 to support and raise the engine high enough to enable removal of the upper oil pan.
16. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
17. Remove the remaining upper oil pan bolts.
18. Remove the oil intake pipe bolts.
19. Remove the oil intake pipe.
20. Remove the upper oil pan toward the front of the vehicle.

Use care so as not to damage the aluminum mating surfaces of the upper oil pan.

21. Remove the rubber seal (1).
22. Remove all RTV sealant and thoroughly clean the oil pan housing and engine block.

### Installation Procedure

1. Apply a bead of silicone sealing compound, GM P/N 12346286 or equivalent, in the bottom of the upper oil pan groove.

Keep the bead at least 10 mm (0.4 in) from the bolt holes to prevent carry over onto bolt threads.

2. Install the new rubber seal into the groove of the upper oil pan.

Important: Installation of the upper oil pan must be carried out within 10 minutes of applying the sealant.

3. Apply a 3 mm (0.12 in) bead of silicone sealant, GM P/N 12346286 or equivalent, on the OUTSIDE edge of the seal at the front of the upper oil pan and apply an identical bead on the INSIDE edge of the seal at the rear of the upper oil pan.

The beads will overlap at the middle of the upper oil pan as shown in the supporting illustration.

4. Carefully install the upper oil pan through the front of the vehicle and allow to rest on the crossmember.
5. Install the oil intake pipe.

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.

6. Install the oil intake pipe bolts.

Tighten
Tighten the oil intake pipe bolts to 8 N·m (71 lb in).

7. Hold the upper oil pan in place with four corner bolts.
8. Lower the vehicle.
9. Carefully lower the engine into place.

Ensure the motor mounts are properly aligned.

10. Remove the J 28467-A , the J 28467-450 and the J 36857 .
11. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
12. Install the remaining upper oil pan bolts.

Tighten
Tighten the upper oil pan bolts to 15 N·m (11 lb ft).

13. Install the four transmission bolts to the upper oil pan.

Tighten
Tighten the four transmission bolts to 40 N·m (30 lb ft).

14. Raise the relay rod and install the bolts for the idler arm.

Tighten
Tighten the idler arm bolts to 60 N·m (44 lb ft).

15. Raise the catalytic converters into place and install the catalytic converter nuts.

Tighten
Evenly tighten the catalytic converter nuts to 25 N·m (18 lb ft).

16. Install the catalytic converter bolts (1) into the hangers (2).

Tighten
Tighten the catalytic converter bolts to 20 N·m (15 lb ft).

17. Slide the propeller shaft into position.
18. Align the propeller shaft with the markings previously scribed in the removal procedure.
19. Install the propeller shaft bolts.

Tighten
Tighten the propeller shaft bolts to 95 N·m (70 lb ft).

20. Install the A/C compressor hose strap bolt to the upper oil pan.

Tighten
Tighten the A/C compressor hose strap bolt to 8 N·m (71 lb in).

21. Install the engine mount lower nuts. Note the orientation of the locator tab (1).

Tighten
Tighten the engine mount lower nuts to 55 N·m (41 lb ft).

22. Install the oil pan. Refer to Oil Pan Replacement .
23. Install the splash shield.
24. Install the splash shield bolts.

Tighten
Tighten the splash shield bolts until fully seated and not stripped.

25. Lower the vehicle.
26. Refill the engine oil. Refer to Approximate Fluid Capacities .