For 1990-2009 cars

# DETENT DOWNSHIFT MISS OR LATE SOME PARTS INCORRECT

SERVICE PACKAGE 8630983, WHICH CONTAINS VALVE BODY TO SPACER PLATE AND CASE TO SPACER PLATE GASKETS, WAS RELEASED IN ERROR FOR 1981 THM 200 AND 200C TRANSMISSIONS. USE OF THESE INCORRECT GASKETS WILL RESULT IN EITHER MISSING OR LATE DETENT DOWNSHIFTS. THE CORRECT VALVE BODY TO SPACER PLATE AND CASE TO SPACER PLATE GASKETS FOR 1981 THM 200 AND 200C TRANSMISSIONS ARE IN SERVICE PACKAGE 8633970 AND ARE IDENTIFIED BY A SQUARE NOTCH. SEE FIGURE 1.

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.