GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L30-E 🢒 Changing Fluid and Oil Filter

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 158391 Size: SH
  2. Place a drain pan under the transmission main case oil pan.
  3. Remove the front and side transmission oil pan bolts only.
  4. Loosen the rear transmission oil pan bolts approximately four turns.
  5. Lightly tap the transmission oil pan with a rubber mallet or pry to drain the fluid from the main case oil pan.
  6. Remove the transmission oil filter bolts.
  7. Remove the transmission oil filter.
  8. Remove the transmission oil filter gasket.
  9. Place a drain pan under the transmission front oil pan.
  10. Remove the rear bolts from the transmission front oil pan.
  11. Remove the front bolts from the transmission front oil pan leaving one corner bolt in loosely.
  12. Lightly tap oil pan with rubber mallet or pry to drain fluid.
  13. Clean the following components:
    14. • The transmission main case
    • The transmission front adapter case
    • The oil pan gasket surfaces with solvent
    • The oil filter gasket surfaces
    • All traces of gasket material must be removed
    • Air dry

Installation Procedure

    Object Number: 158391 Size: SH
  1. Install the transmission oil filter gasket.

    2. Install the transmission oil filter.

    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.

  2. Install the transmission oil filter bolts.

    3. Tighten
    Tighten the transmission oil filter bolts to 20 N·m (15 lb ft).

  3. Install the transmission front oil pan gasket.
  4. Install the transmission front oil pan.
  5. Install the front oil pan bolts.

    6. Tighten
    Tighten the front oil pan bolts to 11 N·m (96 lb in).

  6. Install the transmission main case oil pan gasket.
  7. Install the transmission main case oil pan.
  8. Install the transmission main case oil pan bolts.

    9. Tighten
    Tighten the main case oil pan bolts to 11 N·m (96 lb in).


    Object Number: 158359 Size: SH
  9. Refill the transmission with DEXRON® III. Fill the transmission (using and oil suction gun) to lower edge of oil pan fill plug opening.

    10. Tighten
    Tighten the oil pan fill plug to 45 N·m (33 lb ft).

  10. Lower the vehicle.
  11. Inspect the transmission fluid level. Refer to Transmission Fluid Check .