GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Clean the area around the tube/oil fill cap before removing the tube/oil fill cap in order to prevent contaminants from falling into the valve rocker arm cover opening.

  2. Object Number: 73910  Size: SH
  3. Twist counterclockwise to unlock the tube/oil fill cap from the valve rocker arm cover.
  4. Lift the fuel injector sight shield up at the front and slide the tab out of the engine bracket.
  5. Replace the tube/oil fill cap in the valve rocker arm cover.

Installation Procedure


    Object Number: 73910  Size: SH
  1. Remove the tube/oil fill cap from the valve rocker arm cover.
  2. Insert the tab of the fuel injector sight shield under the engine bracket.
  3. Place the hole of the fuel injector sight shield onto the oil fill neck of the valve rocker arm cover.
  4. Install the tube/oil fill cap into the valve rocker arm cover and twist clockwise in order to lock the detent on the tube into the notch in the cover.