Colorado 4WD L5-3.7L (2007)
7. Remove the sunroof front trim cover. Refer to Sunroof Front Trim Cover Replacement in SI.
8. Have an assistant inside the vehicle to signal you when the leak is detected.
9. Perform a water test to verify the leak concern.
10. If a leak is found, try to pinpoint the exact location that the water is entering. It could be any of the following four areas:
1. The leak may be entering from the roof panel and upper sunroof frame.
2. The leak may be entering from the upper sunroof frame seal and lower frame.
3. The leak may be entering from the sunroof glass and glass seal.
4. The water may be entering from around the sunroof glass clip holder.
11. Dry off the sunroof glass, outer sunroof frame and the roof panel.
12. Tape off around the entire outside perimeter of the upper sunroof frame assembly and outside the roof panel with masking tape.
13. Start water testing at the left front outer roof panel and sunroof frame by removing one inch of tape at a time until the source of the leak can be
pinpointed.
14. Proceed with the water test while removing the masking tape along the right front outer sunroof frame and roof panel until the complete area has
been tested.
15. Tape off the entire area around the outside perimeter of the sunroof glass and sunroof frame with masking tape.
16. Proceed to water test up to the sunroof glass and sunroof frame.
17. Start water testing while removing the masking tape from the left front corner of the sunroof glass; then proceed along to the right front corner of
the glass until the complete area has been tested.
18. Have an assistant signal you when the leak is detected.
19. Note the area you are water testing and mark the entry point of the water.
20. The leak could be from more than one area, so determine which conditions apply and follow the recommended corrections below.
Condition 1
The leak condition is present between the roof panel (1) and the dry seal on the upper sunroof frame.
Cause 1
The dry foam seal on the upper sunroof frame assembly may have collapsed or has become distorted, causing the leak.
Correction 1
Remove the sunroof module assembly and apply CRL7711 Sealer (a one-part butyl adhesive) to the outer edge of the upper sunroof frame using the
procedure listed below:
1. Remove the sunroof motor. Refer to Power Sunroof Motor Replacement in SI.
Important
Note the size, color and locations of the lower sunroof frame screws when removing them.
2. Remove the six (black) TORX(R) screws from each side of the lower sunroof frame.
Important
Do Not remove the (red) TORX(R) screws from the track.
3. Remove the eight (gold) TORX(R) screws from the lower sunroof frame.
4. Remove the lower frame from the sunroof module assembly.
Important
Have a clean workbench with a flat protective cover. The cover will help protect the sunroof glass when the glass is placed face down on
the bench.
5. Remove the sunroof module and window from the vehicle and place the glass side down on a clean bench.
Tip
The sunroof window can now be manually moved forward or backward.
6. Manually close the sunroof window to the sunroof module assembly.
7. Clean the outside area of the upper sunroof frame with GM(TM) Glass Cleaner for vehicles built without adhesive under the sunroof frame. If the
sunroof frame has adhesive applied to the frame, use masking tape to clean the frame and seal.
