Roof - Drumming Noise

89Pontiac22

Bulletin Number: 89-10-33
Reference Number: 901605R
Publish Date: 10/89
Subject: "DRUMMING" SOUND IN ROOF PANEL (REPAIR PROCEDURE)

Models
Affected: 1989 BONNEVILLE 4-DOOR MODELS

Figure 1:

In the event, a "drumming type" noise is heard in the roof panel area it will be necessary to install sound deadener patches to the underside of the roof panel.

To correct this condition use the following repair procedure:

1. Remove headliner assembly as described in the 1989 Body Service Manual, Section 8-2.

2. Obtain sound deadener patch, part number 20742581 (305 x 305 mm).

3. The repair involves splitting two of the patches and placing them between the number 1, 2, 3 and 4 roof bows. On the open area behind the number 3 bow, two of the full patches (20742581) should be used, See Figure 1.
4. Reinstall headliner assembly.

Parts are currently available from GMSPO.

Warranty Information:

Labor Operation Number: C3098
Labor Time : .5