For 1990-2009 cars

# ENGINE CODE NUMBER LABEL LOCATION

AN ENGINE TRACEABILITY LABEL IS NOW AFFIXED TO THE OUTBOARD SIDE OF LEFT ROCKER ARM COVER ON V-6 (231 AND 252) BUICK BUILT ENGINES. IT IS REQUESTED THAT ALL FUTURE PRODUCT REPORTS ON ENGINE RELATED ITEMS INCLUDE THE INFORMATION FROM THIS LABEL AS SHOWN IN THE ILLUSTRATION. INFORMATION FROM ANY OF THE OTHER LABELS IS OF NO VALUE IN HELPING TRACK CHANGES INCORPORATED IN THE ENGINE. (ILLUSTRATION).

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.