The inner shield windshield, which was previously used on all 1986 and 1987 Eldorados and Sevilles has been eliminated for these car lines effective with the start of 1988 model production. The inner shield was removed to improve customer satisfaction related to damage resistance, cleanability, and decal removal.
The inner shield windshield, P/N 20644887, should be used to service 1986 and 1987 vehicles until the current supply of service parts is exhausted. After that point, the 1988 non-inner shield windshield, P/N 20685206, should be used to service all 1986 through 1988 vehicles.
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.