Condition/Cause/Correction
Condition #1Important
For vehicles equipped with sunroof (RPO C3U), prior to any repairs, verify vehicle eligibility and completion of Campaign #08207A.
Some customers may comment on water dripping/leaking from the overhead front and/or rear headliner areas, including the dome lamp. In addition, the front floor foot-well area of the carpet may be wet.
Cause #1
The primary cause of the leaks in this area is a result of the stationary glass roof drains allowing too much water for the sunroof drain system to manage. When exceeding this threshold, the water overflows onto the headliner and into the vehicle.
If water overflows on the headliner, it can travel to the front of the vehicle and down the inside of the A-pillar. Therefore, water may be present in the front floor foot-well area, on either the driver or passenger side. If water is present in the foot-well area, inspect the park brake switch and the fuse box for water damage. Replace if necessary.
If the stationary glass roof drain holes are sealed, or not present, and water is evident in the areas mentioned above, inspect for a urethane void around the rear stationary glass.
Correction #1
Important
All vehicles built prior to April 1, 2008 have drain holes in the roof sheet metal around the rear stationary glass. These holes are pierced through the roof structure and allow water to flow in to the vehicle. To confirm that water is entering through these holes, remove the sunroof frame and pour water around the rear fixed glass on the outside of the vehicle.
TECHNICIANS MUST SEAL THESE HOLES TO STOP WATER FROM ENTERING THE VEHICLE. ONCE THESE LOCATIONS ARE SEALED, NO WATER CAN ENTER THE VEHICLE IN THESE AREAS.
Important
Water dripping from the middle drain hose connection area, shown above, is due to the stationary glass holes leaking water, NOT the sunroof frame. Water flowing through these roof structure drain holes may miss the water management gutter, dripping onto the topside of sunroof frame and running to the underside of the frame where the black plastic drain spout attaches to the aluminum.
Whether two or four holes are present, plug the stationary glass drain holes in the roof sheet metal using the following steps:
1. Lower the headliner following the procedure in SI.
Important
The sunroof fixed rear panel glass has been removed for illustration purposes.
2. Loosen the front sunroof module bolts half way. Remove the sunroof drains. Remove the remaining sunroof module bolts and lower the rear of the sunroof module assembly following procedures in SI.
Note
The photo above, taken after the sunroof module was removed, is the view from inside the vehicle looking up at the drain holes around the rear fixed glass.
3. Whether two or four holes are present, seal the holes in the roof sheet metal from inside the vehicle. Refer to the illustration above.
Important
When plugging the holes, make sure to use a windshield urethane sealant and NOT a silicone sealant. See the Parts Information section of this bulletin for the proper sealant.
Important
Ensure the urethane fills directly into the center of the hole (noted by the white area the illustration above) and pushes upward to completely seal the hole.
4. Clean the four holes in the roof sheet metal and fill with a small amount of windshield urethane sealant.
5. Reinstall the sunroof module.
6. After the repair, run a second water test for leaks.
Cause #2
A sunroof drain hose may be improperly routed.
Correction #2
Inspect the drain hose routing between the "B" and "C" pillar for proper routing.
Figure 1 - Incorrect Routing
Figure 2 - Correct Routing
- Make sure that the hose is routed in back of the air bag bracket. Figure 1 shows the incorrect routing and Figure 2 shows the correct routing.
- Also make sure that there are no bends pointing upward in the drain tubes.
Cause #3
There may be a void in the sealer under the roof ditch molding.
Correction #3
Inspect the roof ditch area under the molding for water leaks.
Listed below are where the leaks may occur and what they may look like.
Remove the roof ditch molding, clean the affected area and seal the void with KENT High Tech Clear Seam Sealer, 5 oz. tube P/N 10200.
After the repair, run a second water test for leaks.
Most leaks are on the outboard side of the ditch.
Pins holes near the front.
Rear of the vehicle with pin holes next to roof ditch molding clip.
Leak point at the rear.
Leak point at the rear.
Cause #4
The end of one of the front drains may be plugged with grease from the sunroof or debris may be caught in the cross hatch at the end of the drain tubes.
Correction #4
Verify that any water is flowing freely and exiting the vehicle. If the sunroof water trough assembly does not overflow onto the headliner, do not perform the following repair.
Inspect for plugged front sunroof drains by completing the following steps:
1. Pour water into the sunroof trough assembly to verify that the front drains are not plugged.
2. Remove the "A" pillar trim and defroster outlet grille to gain access to the end of the drain tubes.
3. Remove the rubber grommet at the end of the drain tube. Refer to the illustration above.
Important
To ensure good water flow, remove as much of the grommet material as possible.
4. Using a knife, carefully remove the cross hatch inside the grommet and reinstall. Another solution is to utilize a 3/8 in spot weld drill bit to remove the cross hatch. Refer to the illustration above.
5. After the repair, run a second water test for leaks.
Cause #5
One of the rear drain hoses may have a restriction, and the water is not flowing and exiting the vehicle properly.
Correction #5
Verify a rear drain hose water restriction by using the following steps:
1. Lift the front end of the vehicle approximately 305 mm (12 in) off the ground.
2. Remove the sunroof window. Refer to Sunroof Window Replacement in SI.
3. Pour water into the sunroof housing cross-car drain gutter, at the rear of the window opening.
4. Inspect for proper water flow and exit from the vehicle.
5. If flow is restricted, clean or replace the rear drain hose, as necessary.
6. Reinstall the sunroof window. Refer to Sunroof Window Replacement in SI.
Condition #2
Note
This condition is specific to 2007-2008 Acadia and Outlook models only.
Some customers may comment on water dripping onto the seats or door trim panel, with the door fully closed. The water leak is often noted in the area of the upper door frame, and is usually more evident on the front doors.
Cause
This may be due to a lack of seal compression in the weatherstrip to door header area, leading to inadequate resistance to water intrusion. New weatherstrips, with an improved seal profile, have been made available to address this issue.
Correction
Important
It is not necessary to replace ALL the door weatherstrips. Only replace the weatherstrip of the door where the leak occurs AND the weatherstrip of the same, opposite side door. Whether for the front or rear doors, they should be replaced in pairs.
Replace the front or rear door opening weatherstrips, as appropriate. Refer to Front Door Opening Weatherstrip Replacement or Rear Door Opening Weatherstrip Replacement in SI.
Condition #3
Some customers may comment that the right front floor is wet below the instrument panel.
Cause
Water from the right front sunroof drain hose exits the vehicle through the plenum (upper arrow) and may re-enter through the un-sealed seam at the front of the dash. Refer to lower arrow in the illustration.
Correction
If water is evident in this location, refer to Bulletin # 08-08-57-003A for repair information.
Condition #4
Some customers may comment on water leaks in the rear compartment area, or the rear compartment carpet being wet.
Cause #1
Water may be leaking from the floor extension seam (1) noted above, or along the inner liftgate.
Correction #1
Inspect the tail lamp pocket for any voids in seam sealer (1) and for cloth tape (2) positioning and sealing.
Tip
You may have to partially remove the weatherstrip at the tail lamp pocket area for the visual inspection below.
- R & R the tail lamp and inspect along the surface (1), shown above, for any voids in the seam sealer. Seal any voids with KENT High Tech Clear Seam Sealer, 5 oz. tube P/N 10200.
Note
The example above shows a cloth tape (1) that is curling up because of incomplete wet out to the metal surface.
- To protect against water intrusion, ensure that the cloth tape is present and the hole is completely covered. If noted to be missing or damaged, install new cloth tape, obtained locally.
Cause #2
Water may be leaking from either of the rear roof header inner frame holes (1) as shown above.
Correction #2
Note
The cause of this condition has sometimes been found to be voids in the rear roof ditch, next to the retaining clip. under the roof ditch molding. This repair was addressed previously in Condition #1, Correction #2.
Inspect the liftgate opening upper frame area for any voids in seam sealer, and for the positioning of the liftgate opening weatherstrip.
- Inspect the liftgate opening upper frame below the roof ditch (1) for any voids in the seam sealer. Seal any voids with KENT High Tech Clear Seam Sealer, 5 oz. tube P/N 10200.
- Partially remove the liftgate opening weatherstrip from the roof header pinch weld. Inspect the ditch area next to the hinge (1) for any voids in the seam sealer. Seal any voids with KENT High Tech Clear Seam Sealer, 5 oz. tube P/N 10200.
- Also inspect the liftgate opening upper frame area (2), shown above, for any excess sealer that may prohibit the weatherstrip from fully seating. Remove any excess sealer that may be holding the weatherstrip out of position and reinstall, ensuring the weatherstrip is fully seated.