TrailBlazer 4WD L6-4.2L VIN S (2002)
10. Disconnect the prop shaft from the front axle pinion yoke.
11. Remove the oil pan drain plug and drain the oil.
12. Unclip the transmission cooler lines from the engine block.
13. Remove the front differential bolts and set aside the front differential.
14. Remove 4 transmission bell housing bolts that are attached to the oil pan.
15. Remove the remaining oil pan bolts.
16. Place 2 oil pan bolts in the jack screws on the oil pan and tighten evenly to release the oil pan from the engine.
17. Clean and inspect the oil pan.
Installation Procedure
Important: The oil pan must be installed within 10 minutes from when sealer was applied
1. Apply a 3 mm (0.12 inch) bead of sealer GM PN 12378521 to the block, rather than the oil pan.
Important: When you install the oil pan, it could be shifted front or back a little which could cause a transmission alignment problem. The back of
the oil pan needs to be flush with the block.
2. Install the oil pan, maneuvering the oil pan to clear the oil pump and screen assembly.
3. Install the oil pan bolts.
