THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 91-248-10, DATED MARCH 1991. THE SERVICE PROCEDURE UNDER STEP 1 HAS BEEN REVISED. ALL COPIES OF 91-248-10 SHOULD BE DISCARDED.
Application: 1982-1991 F-Styles (Less Convertibles) Prior To VIN Breaks:
ML171515
Condition: Waterleaks into the rear compartment area.
Cause: Water entry may be in one or all of the following areas:
1. Between the weatherstrip and lift compartment window and or rear panel.
2. Between the weatherstrip and vertical mounting flange on the body.
3. Between the plastic seal and sealing area on the rear compartment lift lid that bridges the space between glass and rear panel.
Correction: 1991 models after the above VIN breaks will have new weatherstrips and seals on the rear compartment lift window. Past model vehicles may be repaired with these parts using the following procedure:
1. Replace the rear compartment opening weatherstrip with new P/N 10191818. This weatherstrip has a new section profile (additional upper lip), a clear mastic sealer for flange sealing and notches to be located at the rear panel seams to relieve any build up of water.
a. Loosen the compartment lid assist rod attaching screws at the lid end.
b. On 1991 models, disconnect the electrical wire for the Center High Mounted Stop Light at the rear body opening garnish molding on the roof.
c. While supporting the lid, remove the assist rod attaching screws and then the compartment weatherstrip.
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.