GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 LeSabre 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Engine Oil and Oil Filter Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Position the oil drain pan under the engine oil drain plug.
  3. Remove the engine oil drain plug.
  4. Clean and inspect the engine oil drain plug, repair or replace if necessary.
  5. Clean and inspect the engine oil drain plug sealing surface on the oil pan, repair or replace oil pan if necessary.

    6. Object Number: 499828 Size: SH
  6. Remove the oil filter.
  7. Clean and inspect the oil filter sealing area on the oil filter adapter, repair or replace if necessary.

Installation Procedure

    Object Number: 499828 Size: SH
  1. Lightly oil the replacement oil filter gasket with clean oil.

    2. Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

  2. Install the new oil filter.

    3. Tighten
    Tighten the new oil filter to 3/4 to 1 full turn, after the oil filter gasket contacts the oil filter mounting surface.

    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 the engine oil drain plug.

    4. Tighten
    Tighten the engine oil drain plug to 30 N·m (22 lb ft).

  4. Lower the vehicle.
  5. Fill the engine with new engine oil. Refer to Approximate Fluid Capacities in Maintenance and Lubrication.
  6. Inspect for oil leaks after engine start up.