Colorado 2WD L5-3.5L VIN 6 (2005)
Sunroof / Moonroof Panel: Customer Interest
Body - Water leaks/ Wind Noise From The Sunroof
TECHNICAL
Bulletin No.: 07-08-67-001B
Date: June 22, 2009
Subject: Sunroof Leaks Water, Wind or Whistle Noise from Sunroof (Determine Source of Leak and Apply Sealer)
Models:
2005-2009 Chevrolet Colorado
2005-2009 GMC Canyon
with RPO CF5 Sunroof
Supercede:
This bulletin is being revised to add the 2009 model year. Please discard Corporate Bulletin 07-08-67-001A (Section 08 - Body & Accessories).
Condition
Some customers may comment on water entering into the vehicle from the sunroof area. Other customers may comment on a wind noise or whistle noise
heard from the sunroof area when driving at different speeds.
Design
The sunroof module is designed to be completely sealed at the roof panel to help prevent water from traveling past the glass panel seal. The sunroof glass
assembly does not have any glass panel adjustments. The sunroof assembly does not contain a water management drain tube system. When operating the
sunroof, the glass panel moves rearward and slides up above the roof panel. Therefore, the vehicle must be driven or the exterior dried off sufficiently to
remove excessive water prior to opening the sunroof glass. If the water is not sufficiently dissipated, some water may enter inside the vehicle.
Cause
Some earlier built vehicles with the sunroof option did not have any adhesive sealer installed on the upper sunroof frame assembly.
Wind or Whistle Noise Test Procedure
Determine the source of the wind or whistle noise. Refer to Air/Wind Noise in SI.
Water Hose Test Procedure
Perform a water hose test to determine where the leak is entering the sunroof assembly.
Important
Use a water hose without the nozzle attached at a controlled medium volume water flow.
1. Visually inspect the sunroof glass. The glass should be flush to the sunroof frame. If the glass (1) like in the graphic above is not flush, make sure
no parts are broken or missing from the sunroof module assembly.
2. Make sure all seals and tracks are clean and free of debris. Use a dampened lint free cloth with warm water to clean the seals. Use GM(TM) Glass
Cleaner, P/N 89021822 (in Canada, 992727) to clean the tracks.
3. Open the sunshade to the full open position.
4. Open the sunroof window to the full open position.
5. Remove the four outer trim cover screws located outside of the sunroof module.
6. Remove the outer trim cover.
