GM Service Manual Online
For 1990-2009 cars only

In order to locate the exact leak point, or in order to repair the leak, you may have to remove some interior trim panels or components. Refer to Recommended Materials (Waterleak Repair) .

After completion of any waterleak repair, retest the general area using the Generalized Testing method. Do not use high pressure air or a water hose for testing repaired areas. The fresh repair material may dislodge under abnormal pressure.