GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 DeVille 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Pump Disassemble

    Object Number: 12016 Size: SH
  1. Remove the two 10-mm bolts (226) from under the scavenge pump cover (237) and scavenge pump body (225).

    2. Object Number: 12018 Size: SH
  2. Remove the secondary pump body (203) from the pump assembly. This is a snug fit due to the use of two dowel pins.

    3. Object Number: 12019 Size: SH
  3. Remove the oil pump drive shaft (207), and the secondary pump gears (205, 206).

    4. Object Number: 12020 Size: SH
  4. Remove the scavenge pump body (225) from the scavenge pump cover (237).
  5. Remove the scavenge pump gears (223, 224).

    6. Object Number: 12021 Size: SH
  6. Remove the primary pump body (200) from the scavenge pump cover (237).
  7. Remove the primary pump gears (201, 202).