GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 GTO 🢒 Engine 🢒 Engine Mechanical - 6.0L 🢒 Oil Pan Cleaning and Inspection

    Object Number: 1546115 Size: SH
  1. Remove the oil filter fitting (438) and bypass valve (436), as required. Refer to Oil Filter, Adapter, and Pan Cover Removal .

    2. Object Number: 1593668 Size: SH
  2. Remove the oil pressure relief valve (455) and washer (458).

    3. Object Number: 1593670 Size: SH
  3. Inspect the displacement on demand oil pressure relief valve for proper operation. Lightly depress the ball (2). The valve spring (1) should seat the ball to the proper closed position.

    4. Object Number: 1272623 Size: SH
  4. Remove the oil filter tube (447), bolts (435), studs (456), and gaskets (445).

    5. Object Number: 1272628 Size: SH
  5. Remove the oil gallery plugs (449).

    6. Object Number: 309736 Size: SH
  6. Remove the bolts and baffle.
  7. Clean the oil pan in solvent.

    8. Caution: Refer to Safety Glasses Caution in the Preface section.

  8. Dry the oil pan with compressed air.
  9. Inspect the oil pan for the following conditions:
    10. • Damaged gasket surfaces
    • Restrictions within the oil passages of the pan
    • Damaged oil filter seal surface or inoperative oil filter bypass valve
    •  Lightly depress the valve. The valve spring should seat the valve to the proper closed position.
    • Threaded bolt holes for damage
  10. Inspect the oil filter tube for restrictions or damage.