GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Oil Pan Replacement

Removal Procedure

    Object Number: 53540 Size: SH
  1. Remove the transmission. Refer to Transmission Replacement in Automatic Transmission.
  2. Drain the engine oil.
  3. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Replacement .
  4. Remove thirteen oil pan bolts.
  5. Remove the oil pan. The gasket is reusable unless damaged. Do not remove the gasket from the oil pan groove unless replacement is required.

Installation Procedure

    Object Number: 53540 Size: SH
  1. Install the new oil pan seal if required by starting the seal into the pan groove and working the seal into the groove in both directions. Once the seal is exposed to the oil it will expand and no longer stay in the groove without wrinkles. If this condition exists, replace it with a new seal.
  2. Position the oil pan to the crankcase.

    3. Object Number: 53647 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install thirteen oil pan bolts.

    4. Tighten
    Tighten the bolts to 10 N·m (89 lb in) in sequence shown.

  4. Instal the exhaust crossover. Refer to Exhaust Crossover Replacement .
  5. Install the transmission. Refer to Transmission Replacement in Automatic Transmission.
  6. Refill the engine oil.