GM Service Manual Online
For 1990-2009 cars only

Object Number: 160905  Size: SH

A water test stand should be used if the general area of the leak is not evident. Once the general leak area has been located one of the localized test procedures can the be used to pin point the leak.

    • Submit the vehicle to a water spray of 155 KPa (22 psi) for 10 to 20 minutes.
    • When testing the windshield seal set the stand(s) so the nozzles points at approximately 30 degrees down and 45 degrees toward the rear of the vehicle.
    • When testing the windshield header and front body pillar weatherstrips set the stands so the nozzles point approximately 30 degrees down and 45 degrees toward the rear of the vehicle.
    • When testing the side of the vehicle the set the stands so the nozzles point approximately 30 degrees down and 45 degrees toward the rear of the vehicle.
    • When testing the rear window and rear compartment lid set the stands 600 mm (24 in) from the corner of the rear window with the nozzles pointing approximately 30 degrees down and 30 degrees toward the front of the vehicle.