Side Roof Rail Weatherstrip - New Style
Number 87-10-15B Date 8/87Subject: NEW STYLE SIDE ROOF RAIL WEATHERSTRIP
1978-87 GRAND PRIX WITHOUT HATCH ROOF (CC1) OPTION
"This bulletin supersedes bulletin 87-10-15A, dated 7/87. The part numbers were listed for the wrong sides. Please discard original bulletin and replace it with this one."
Beginning January, 1987, a new style side roof rail weatherstrip is used on 1987 Grand Prix without hatch roof option. These new weatherstrips exhibit very little appearance change, however, they are thicker and softer to minimize wind noise.
The new weatherstrips are available from GMSPO under part numbers:
20737658 - Right Side 20737659 - Left Side
These part numbers supersede current part numbers and apply to 1978 thru 1987 model years.