DURING THE MONTH OF AUGUST, 1980, A PRODUCTION TRIAL RUN (P.T.R.) WAS MADE USING A 1ST DESIGN P.T.R. CONVERTER CLUTCH ACTUATOR VALVE SHOWN IN FIGURE 1. THE FOLLOWING MONTH OF SEPTEMBER, 1980, ANOTHER PRODUCTION TRIAL RUN (P.T.R.) WAS MADE USING A 2ND DESIGN P.T.R. CONVERTER CLUTCH ACTUATOR VALVE ALSO SHOWN IN FIGURE 1. FOR SERVICE APPLICATIONS, USE THE CURRENT DESIGN CONVERTER CLUTCH ACTUATOR VALVE. (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.