GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 Engine 🢒 Engine Mechanical - 6.5L 🢒 Oil Filter Adapter and Bypass Valve Assembly Replacement

Removal Procedure
  1. Raise the vehicle. Support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 181988 Size: SH
  2. Remove the oil filter from the oil filter adapter.
  3. Remove the oil filter adapter from the engine block.

    4. Object Number: 66576 Size: SH
  4. Remove the oil cooler bypass valve. Refer to Oil Filter Adapter Removal .

Installation Procedure

    Object Number: 59939 Size: SH
  1. Install the oil cooler bypass valve into the engine block. Refer to Oil Filter Adapter Installation .

    2. Object Number: 181988 Size: SH
  2. Install the oil filter adapter into the engine block.
  3. Install the oil filter to the oil filter adapter. Refer to the instructions on the oil filter for the installation procedure.
  4. Remove the safety stands and lower the vehicle.