GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 Engine 🢒 Engine Electrical 🢒 Oil Pan Cleaning and Inspection

    Object Number: 1402155 Size: SH

    Note: When installing a NEW oil pan gasket, it is not necessary to install the rivets that retain the NEW gasket to the pan.

  1. Remove the oil filter tube bolts (435, 446) and gaskets (445, 448).
  2. Remove the oil filter tube (447).

    3. Object Number: 1215985 Size: SH
  3. Remove the plugs (449) from the oil galleries.

    4. Object Number: 825846 Size: SH
  4. Remove the oil pan baffle and bolts.
  5. Remove the oil filter fitting, as required. Refer to Oil Filter Removal.
  6. Clean the oil pan in solvent. Thoroughly clean all of the oil passages and recesses of the pan.

    7. Warning: Refer to Safety Glasses Warning in the Preface section.

  7. Dry the oil pan with compressed air.
  8. Inspect the oil pan for the following conditions:
    9. • Damaged gasket surfaces
    • Restrictions within the oil passages of the pan
    • Threaded bolt holes for damage

    Object Number: 1402158 Size: SH
  9. Inspect the oil filter tube for restrictions or damaged gasket surfaces.
  10. Inspect the active fuel management oil pressure relief valve for proper operation.

    11. Lightly depress the valve (2). The valve spring (1) should seat the valve to the proper closed position.


    Object Number: 1517092 Size: SH
  11. The oil pressure relief valve (455) is press-fit into the oil filter tube and is serviceable separately.