Removal Procedure

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Use 3M® General Purpose Adhesive Cleaner 3M P/N 08987 or the equivalent, if needed, in order to remove the left side rear door upper weather-strip from the door.
Remove the left side rear door upper weather-strip retainers from the holes in the door.

Fig 1: Removing Left Side Rear Door Upper Weatherstrip
Courtesy of GENERAL MOTORS CORP.