GM Service Manual Online
For 1990-2009 cars only

Pressure Relief Valve Replacement Pickup

Removal Procedure

  1. Remove the pickup box. Refer to Pickup Box Replacement .

  2. Object Number: 303110  Size: SH
  3. Remove the pressure relief ventilation valve assembly.
  4. Use a flat-bladed tool in order to pry the valve out of the rear of the cab.

Installation Procedure


    Object Number: 303110  Size: SH
  1. Install the pressure relief ventilation valve into the assembly.
  2. Firmly press the valve into the rear of the cab.

  3. Install the pickup box. Refer to Pickup Box Replacement .

Pressure Relief Valve Replacement Utility

Removal Procedure

  1. Remove the body side stationary window (2-Door only). Refer to Body Side Window Replacement in Stationary Windows.

  2. Object Number: 303139  Size: SH
  3. Remove the molding from the quarter panel rear window (4-Door only).

  4. Object Number: 303129  Size: SH
  5. Remove the pressure relief ventilation valve using a flat-bladed tool in order to release the retainers.

Installation Procedure


    Object Number: 303129  Size: SH
  1. Install the pressure relief ventilation valve assembly pressing into place until firmly seated.

  2. Object Number: 303139  Size: SH
  3. Install the molding to the quarter panel rear window (4-Door only).
  4. Install the molding fasteners to the quarter panel rear window (4-Door only).
  5. Install the body side stationary window (2-Door only). Refer to Body Side Window Replacement in Stationary Windows.