ALTERNATOR DRIVEN VACUUM PUMP, P/N 2063517, SERVICING MAY NOW BE ACCOMPLISHED BY USE OF KIT, P/N 8885789. THE KIT INCLUDES THE FOLLOWING ITEMS: 4-ROTOR VANES 1-SHELL "O" RING 1-SHAFT SEAL IN ADDITION, THE SUBJECT VACUUM PUMP UTILIZES METRIC STYLE THREADS FOR OIL FEED, VACUUM SUPPLY AND OIL RETURN CONNECTIONS. (UNLESS COMPATIBLE METRIC THREAD ADAPTER FITTINGS ARE ORDERED, DIFFICULTY MAY BE ENCOUNTERED IN OBTAINING THE CORRECT THREAD SIZE LOCALLY.) CURRENTLY THE 2063517 PUMP IS SHIPPED WITH ALL THE APPROPRIATE ADAPTER FITTINGS PACKED LOOSE WITH THE PUMP. WHEN STOCK IS DEPLETED OF THE 2063517 BARE PUMP, P/N 2055756 PUMP ASSEMBLY, WILL BE SERVICED WHICH WILL INCLUDE PRE-INSTALLED ADAPTER FITTINGS. IN THE EVENT THAT AN INDIVIDUAL METRIC ADAPTER FITTING OR SEALING WASHER IS REQUIRED, APPROPRIATE PART NUMBERS ARE LISTED IN SECTION 4.895 OF THE MEDIUM DUTY PARTS BOOK.
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.