GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Chevy C Silverado - 2WD 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Oil Filter Adapter and Bypass Valve Assembly Replacement

Removal Procedure

    Object Number: 843884 Size: SH
  1. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  2. Loosen the oil filter fitting using a hex wrench.
  3. Remove the oil filter fitting.

    4. Object Number: 843888 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: 843888 Size: SH
  1. Install NEW oil bypass valves. Stake the tangs on the new oil bypass valves.

    2. Object Number: 843884 Size: SH
  2. Inspect the oil filter fitting, replace as necessary.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the oil filter fitting.

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

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