GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Oil Filter Adapter and Bypass Valve Assembly Replacement

Removal Procedure

    Object Number: 452375 Size: SH
  1. Remove the engine oil filter. Refer to Engine Oil and Oil Filter Replacement.
  2. Loosen the oil filter fitting using a hex wrench.

    3. Object Number: 471026 Size: SH
  3. Remove the oil filter fitting.

    4. Object Number: 471143 Size: SH
  4. Remove the oil filter bypass valves.

    5. Unstake the tangs on the oil bypass valves and remove with long nose pliers.

  5. Discard the oil bypass valves.

Installation Procedure

    Object Number: 471143 Size: SH
  1. Install NEW oil bypass valves. Stake the tangs on the new oil bypass valves.

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


    Object Number: 471026 Size: SH
  2. Inspect the oil filter fitting, replace as necessary.
  3. Install the oil filter fitting.

    4. Tighten
    Tighten the oil filter fitting to 66 N·m (49 lb ft).

  4. Install the oil filter. Refer to Engine Oil and Oil Filter Replacement.