INTERMITTENT HISS TYPE NOISE FROM OUTSIDE REAR VIEW MIRROR

Subject: Intermittent Hiss Type Noise from Outside Rear View Mirror ---------------------------------------------------------- (Repair/Repaint Mirror) -----------------------

Models: 1997 Pontiac Grand Prix -----------------------

Condition

Some owners may comment that at speeds of 50 mph (80 km/h) and above, an intermittent type "hiss" noise can be heard at the "N' pillar. During diagnosis, the vehicle should be driven at different speeds and direction because the condition is sometimes difficult to reproduce.

Cause

This condition may be caused by a mold parting line inside the styling hole of the mirror. See Figure 1 for location. This may also be caused by an outer belt seal/molding not properly contacting the glass surface.

Correction

Important: Prior to any mirror repair, the hole in the middle of the mirror should be taped over and the vehicle should be test driven to verify that this corrects the above condition.

Important: On vehicles built after VIN VF263918, a step has been built into the styling hole of the mirror (see Figure 1, Item 2). DO NOT remove this step.

To correct the above condition, remove the parting line inside the styling hole of the mirror and repaint the mirror. See Figure 1, Item 1.

Before the mirror is reinstalled, replace the window belt reveal molding on vehicles built before VIN VF218000. The new molding has a round outer edge added to the top which acts as a stiffener. See Figure 2.

Parts Information

Window S/D belt reveal molding:

RH LH Description -------- -------- -------------------- 10294041 10294042 Sedan Bright Black 10294043 10294044 Sedan Black 10294047 10294048 Coupe Black

Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation Description Labor Time --------- ----------- ---------- R3290 RH - R/R Mirror 0.6 hr Outside Rear View

R3291 LH - R/R Mirror 0.6 hr Outside Rear View

Add To Remove Flashing 0.2 hr

Add To Refinish 0.3 hr (GB)

RH - R/R Front Use published B7840 Door Window labor operation Reveal time

LH - R/R Front Door Use published B7841 Window Reveal labor operation time

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.