GM Service Manual Online
For 1990-2009 cars only

    Object Number: 33663  Size: SH
  1. Remove the five rear main oil seal housing bolts.
  2. Remove the rear main oil seal housing.
  3. Remove the gasket.
  4. Notice: Properly support the seal housing to prevent damage to the seal during removal. Damage to the seal will result in an oil leak.

  5. Use the following procedure in order to remove the oil seal:
  6. 4.1. Support the oil seal housing for oil seal removal using two wood blocks of equal thickness.
    4.2. With the wood blocks on a flat surface, position the seal housing and the blocks in order for the transmission side of the oil seal housing to be supported across the dowel pin and the center bolt holes on both sides of the oil seal opening.
    4.3. Drive the crankshaft seal evenly out of the transmission side of the oil seal housing. Use a small chisel in the relief grooves on the crankshaft side of the oil seal housing.