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 assembly.
  6. Use a flat bladed tool in order to remove the valve from the rear of the cab.

Installation Procedure


    Object Number: 303129  Size: SH
  1. Install the pressure relief ventilation valve assembly.
  2. Firmly press the valve into the rear of the cab.


    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.