Tape drive type window regulators that require service on 1984-87 Corvette coupes (prior to VIN H5109849) should be replaced with the convertible type (lift arm) window regulator.
To insure customer satisfaction, the window regulators should be replaced on both sides of the vehicle at the time of the service visit.
The part numbers for the lift arm type regulators are:
22063224 - Right
22063225 - Left
Installation instructions are included in each package.
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.