GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Body Front End 🢒 Oil Filter Adapter and Bypass Valve Assembly Replacement

Removal Procedure

    Object Number: 181988 Size: SH
  1. Raise the vehicle and support with safety stands.
  2. Remove the oil filter from the oil filter fitting (2 wheel drive only).

    3. Object Number: 188406 Size: SH

    Important: Do not damage the engine block when removing the bypass valve.

  3. Remove the oil filter adapter bolt from the engine block (4 wheel drive only).

    4. Object Number: 524884 Size: SH
  4. Remove the oil cooler bypass valve.
    5. 4.1. Install a 4.8 mm (3/16 inch) sheet metal screw into the hole in the cup plug.
    4.2. Using the two small pry bars, take out the cup plug.
    4.3. Use a slide hammer to remove the oil cooler bypass valve from the engine block.
  5. Clean the recess of the engine block.

Installation Procedure

    Object Number: 524884 Size: SH

    Important:  This plug has an orifice hole that prevents an air lock from occurring and blocking the oil flow.

  1. Install the oil cooler bypass valve by using a socket to drive the bypass valve into the bore until seated on the shoulder in the bore.
  2. Install the cup plug for the oil cooler bypass valve.
  3. Install the oil filter bypass valve into the engine block.
  4. Use a socket to drive the valve into the bore until the valve seats against the shoulder inside the bore.

    5. Object Number: 181988 Size: SH
  5. Install the oil filter fitting into the engine block (2 wheel drive only).

    6. Object Number: 188406 Size: SH

    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.

  6. Install the oil filter adapter to the engine block (4 wheel drive only).

    7. Tighten
    Tighten the bolt to 65 N·m (47 lb ft).

    Important: After installing the oil filter to the adapter (4 wheel drive only), it will be necessary to recheck the torque setting on the oil filter adapter.

  7. Install the oil filter on the oil filter fitting.
  8. Lower the vehicle.