GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Engine 🢒 Engine Mechanical - 3.1L 🢒 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. Object Number: 190542 Size: SH
  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: 190543 Size: SH
  6. Remove the oil filter.
  7. Clean and inspect the oil filter sealing area on the engine block, repair or replace if necessary.

Installation Procedure
  1. Lightly oil the replacement oil filter gasket with clean oil and install the new oil filter.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 190543 Size: SH
  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.


    Object Number: 190542 Size: SH
  3. Install the engine oil pan drain plug.

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

  4. Remove the oil drain pan.
  5. Lower the vehicle.
  6. Fill the engine with new engine oil.
  7. Start the engine.
  8. Inspect for oil leaks after engine start up.
  9. Turn off the engine and allow the oil a few minutes to drain back into the oil pan.
  10. Remove the oil level indicator from the oil level indicator tube.
  11. Clean off the indicator end of the oil level indicator with a clean paper towel or cloth.
  12. Install the oil level indicator into the oil level indicator tube until the oil level indicator handle contacts the top of the oil level indicator tube.
  13. Again, remove the oil level indicator from the oil level indicator tube keeping the tip of the oil level indicator down.
  14. Check the level of the engine oil on the oil level indicator.
  15. If necessary, adjust the oil level by adding or draining the engine oil.