GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2005 🢒 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: 1272623 Size: SH
  2. Remove the oil filter tube (447), bolts (435), studs (451), and gaskets (445).

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

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

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

  6. Dry the oil pan with compressed air.
  7. Inspect the oil pan for the following conditions:
    8. • 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
  8. Inspect the oil transfer tube for restrictions or damage.