Condition # 1

Condition #1

Some customers may comment on creak/snap/pop type noise from the sunroof module that occurs while driving over bumps.

Cause

This condition may be caused by the module mounting bolts/fasteners (roof interaction with the fasteners).

Correction

For vehicles built before January 1st, 2006, perform steps 1-8 below (Install mylar washers and lubricate all fasteners). For vehicles built after January 1st 2006, ensure mylar washers are present and not damaged (cut through). If they are present and NOT damaged, lubricate all fasteners (perform Steps 5-8 only). If the mylar washers are damaged, perform Steps 1-8 below.

Important
Use hand tools only, power tools will not allow the compensator to seat properly.

Figure 1





1. Install 28 Mylar washers to the mounting bolts/fasteners. Drop the headliner enough to access these attachments, being careful not to bend or damage the headliner while performing the following procedure. Loosen all four front module mounting bolts (refer to figure 1). Verify that the screws are not engaged into the roof.
Figure 2





2. Install 8 of 28 Mylar washers, two on each of the front four compensators (refer to figure 1 & 2). Figure 3A





Always retract the barrel (down) to begin reinstallation process.Figure 3B





Approximate compensator barrel location after tightening during reinstallation process.
3. Reinstall the front four compensators per the following procedure. Spin all front four compensator barrels all the way down (refer to figure 3 A, B).Figure 4A





Figure 4B





Important
To achieve proper seal to body compression, have one person push firmly upward on the black rail of the module between the two front center compensators as another person tightens the center two compensators (refer to figure 4A). This will improve the seal contact along the front edge of the module to body. Then reinstall the two outboard tolerance compensators to the roof. (Torque specification 10 Nm/89 lb in) (refer to figure 4B)

Figure 5





Figure 6





4. Install 20 of 28 Mylar washers - four to A, C, A1, C1 (refer to figure 5 & 6). Install two washers to B and B1 between the compensator and the roof (refer to figure 2 & 6). Follow the procedure below.

Important
To prevent the sunroof from dropping, loosen one corner at a time following the procedure listed below. Do not over tighten the mounting bolts.

Starting with A, remove the TORX screw from the center of the 19 mm nut. Discard the small retaining spring holding the TORX screw to the 19 mm nut. Insert two Mylar washers in between the TORX screw and the 19mm nut and insert two Mylar washers above the 19 mm nut between the height adjuster and the body (refer to figure 5). Complete this procedure for B, C, A1, B1, C1 using the sequence below.

- Loosen A. (refer to figure 6 and description above).
- Loosen B.
- Install four washers to A (refer to figure 5) and two to B (refer to figure 2).
- Tighten A. (See note # 1 below)
- Loosen C.
- Install four washers to C.
- Tighten C and B. (See note # 1 and note # 2 below).
- Repeat for A1, B1 and C1.
Note # 1: Retighten TORX screw into body to 10 Nm/89 lb in.
Note # 2: Prior to fastening the two side center tolerance compensators B and B1 (refer to figure 6), turn the compensator to lower the barrel to its lowest position (refer to figure 3). Before fastening, get out of the vehicle and observe the main seal to body contact. If the seal appears to have good engagement to the roof, proceed with tightening the center two tolerance compensators screws, B and B1 (torque specification 10 Nm/89 lb in).
If the seal does not appear to have good engagement to the roof, from the inside of the vehicle, have one person push firmly upward on the center black rail of the module, while the other person tightens the two side center compensators B and B1. This will improve the seal compression to module.

Figure 7









5. Lubricate all 10 module compensators/attachments areas with GM Super lube (P/N 12346241 [in Canada use P/N 10953474]) prior to reinstallation of the headliner (refer to figure 7).

Caution
Be cautious when spraying GM super lube. To avoid any damage to the interior trim, cover all exposed areas before spraying. While spraying, use a shop towel with the other hand to catch any drips and pat the sprayed area to remove any excess lubricant.

6. If the vehicle was built before May 9th, 2007, verify that the flock tape is in place on the headliner as described in Condition #10.
7. Test drive the vehicle to confirm that all noises have been eliminated.
8. Reinstall the headliner.