Draining & Refilling

NOTE: If oil pan bolts are equipped with conical washers, DO NOT re-use bolts if conical washers have become reversed. See Fig 1 .

Fig 1: Identifying Conical Washers

Courtesy of GENERAL MOTORS CORP.

Raise vehicle, and place large drain pan under transmission oil pan. Remove transmission oil pan front and side bolts only. Loosen rear bolts about 4 turns each.
Carefully pry pan loose using screwdriver. Allow fluid to drain. Remove remaining bolts, and remove oil pan. Discard old pan gasket. Remove filter and "O" ring or sleeve-type seal. Remove any remaining gasket material on transmission case.
Thoroughly clean pan, magnet and screen (if metal) with solvent, and 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.
Install filter assembly into pick-up tube recess. Install oil pan using NEW gasket, and tighten pan bolts to specification. See TORQUE SPECIFICATIONS (OIL PAN BOLTS) . Add required amount of fluid to transmission through filler tube.
Start engine with gear selector lever in Park and parking brake applied. Engage transmission in each gear, ending in Park. Check fluid level with engine warm. Add fluid if necessary. DO NOT overfill.

TORQUE SPECIFICATIONS (OIL PAN BOLTS)