For 1990-2009 cars

# POWER WINDOW - POPPING NOISE WHEN OPERATING

#### Subject: POWER WINDOW, POPPING NOISE WHEN OPERATING (REPLACE MOTOR ONLY - NEW PART NUMBERS)

#### Models Affected: 1991 FIREBIRD MODELS

Condition: Popping noises when operating power windows upward from full down position.

Cause: Internal components of the motor sticking or binding.

Correction: Replace the window motor with new part # 22121553 using the procedures as described in Section 10-5 of the Service Manual.

#### IMPORTANT: It is not necessary to replace regulators for this condition. Replace the motors only.

Parts are expected to be available on February 4, 1991. Until then normal part orders will not be accepted by GMSPO. only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealer's expense. All other order types will be cancelled as incorrectly ordered while the 400 control is in place.

Labor Allowance: Use published operations and time allowances.

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.