PURPOSE: Two different types of discharge side valve cores are used on A/C systems. These parts are not interchangeable.
PROCEDURE: When servicing a vehicle always identify the type of valve core removed from vehicle and replace with the same type and part number. Refer to the figure for the correct part number for the replacement valve core.
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.