GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

The pressure relief valves are in the front doors of the pickup models. The pressure relief valves are behind the quarter panel stationary glass on utility and Suburban models.


    Object Number: 277787  Size: SH
  1. Remove the outside vent valve assembly by completing the following steps:
  2. 1.1. Remove the screw retaining the assembly to the door.
    1.2. Lift up the valve assembly.

    Remove the valve assembly.


    Object Number: 277788  Size: SH
  3. Remove the inside module valve assembly by completing the following steps:
  4. 2.1. Remove the door trim panel. Refer to Front Side Door Trim Panel Replacement .
    2.2. Drill out the rivets in order to remove the valve.

Installation Procedure


    Object Number: 277787  Size: SH
  1. Install the outside vent valve assembly to the door edge.

  2. Object Number: 277788  Size: SH
  3. Install the inside module vent valve assembly by completing the following steps:
  4. 2.1. Install with rivets the valve assembly to the door.
    2.2. Install the door trim panel. Refer to Front Side Door Trim Panel Replacement .