POWER WINDOW POPPING NOISE WHEN OPERATING UP OR DOWN

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

VEHICLES AFFECTED: 1991 F ONLY

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.

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.