GM Service Manual Online
For 1990-2009 cars only

    Object Number: 20165  Size: SH
  1. Remove the transmission filter assembly (85).
  2. Remove the oil level control valve (86).
  3. Notice: Do not damage the case sealing surface when removing the filter seal assembly.

  4. Using a chisel, indent top of seal to relax press fit of seal.
  5. Using a small screwdriver remove the filter neck seal (84) from the transmission case. The filter neck seal (84) is not reusable and should be discarded.
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