1. Raise the vehicle. Support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Place a drain pan under the transmission oil pan.



3. Remove the oil pan bolts from the front and the sides only.
4. Loosen the rear oil pan bolts approximately 4 turns.

Notice: Pry the oil pan down carefully in order to prevent damage to the transmission case or the oil pan sealing surfaces.

5. Lightly tap the oil pan with a rubber mallet or pry in order to allow the oil to drain.
6. Inspect the oil color.
7. Remove the remaining oil pan bolts.



8. Remove the oil pan.



9. Remove the oil pan gasket.



10. Remove the oil filter.
11. Remove the oil filter O-ring seal.
12. Inspect the O-ring seal. The O-ring seal may be stuck in the case.
13. Remove all traces of old gasket material. Clean the transmission case and the oil pan gasket surfaces with solvent, and allow to air dry.

Tools Required

J 36850 Transjel™ Transmission Assembly Lubricant

Notice: Use J 36850 or equivalent during assembly in order to retain checkballs or to lubricate components. Lubricants other than the recommended assembly lube changes the transmission fluid characteristics and causes undesirable shift conditions or filter clogging.

1. Coat the seal with a small amount of J 36850 or equivalent.



2. Install a new seal into the case.
3. Install a new filter into the case.



4. Install a new oil pan gasket.



5. Install the oil pan.




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 pan bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb ft).




7. Inspect the oil pan bolts and the washers.
8. Use adhesive and sealant compound GM P/N 12345382, or equivalent.
9. Lower the vehicle.
10. Fill the transmission to the proper level with DEXRON®-III oil.
11. Adjust the cold oil level reading for the initial fill. Do not overfill.
12. Inspect the oil pan gasket for leaks.