GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 858161  Size: SH
  1. Remove the oil filter adapter. Refer to Oil Filter Adapter Replacement .
  2. Using a suitable tool, pry the oil filter bypass valve from the engine block.
  3. Discard the oil filter bypass valve.

Installation Procedure


    Object Number: 858161  Size: SH
  1. Press the new oil filter bypass valve into the engine block.
  2. Install the oil filter adapter. Refer to Oil Filter Adapter Replacement .