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Draining & Refilling

NOTE: If oil pan bolts are equipped with conical washers, DO NOT reuse bolts if conical washers have become reversed. See Fig 1.
Fig 1: Identifying Conical Washers
G95E13700Courtesy of GENERAL MOTORS CORP.
  1. Raise and support vehicle. Place appropriate size drain pan under transmission oil pan. Remove transmission oil pan front and side bolts only. Loosen rear bolts about 4 turns each.
  2. Using screwdriver, carefully pry pan loose. Allow fluid to drain. Remove remaining bolts and oil pan. Discard old pan gasket. Remove filter and "O" ring or sleeve-type seal. Remove any remaining gasket material on transmission case.
  3. Thoroughly clean pan, magnet and screen (if metal) with solvent, then dry using compressed air. Replace paper filter (if equipped). Install NEW "O" ring on pick-up tube or NEW sleeve into pick-up tube recess. Lubricate with clean oil before installation.
  4. Install filter assembly into pick-up tube recess. Install oil pan using NEW gasket and tighten oil pan bolts to specification. See TORQUE SPECIFICATIONS . Add required amount of fluid to transmission through filler tube or fill hole.
  5. Start engine with gearshift lever in Park and parking brake applied. Check fluid level. See CHECKING FLUID LEVEL . Add appropriate fluid as necessary. See RECOMMENDED FLUID . DO NOT overfill.