GM Service Manual Online
For 1990-2009 cars only

OIL PAN GASKET PRODUCTION CHANGE

OIL PAN GASKETS: STARTING APPROXIMATELY 11-1-80 A NEW OIL PAN GASKET WENT INTO PRODUCTION ON GAS AND DIESEL ENGINES 4.3, 5.0 AND 5.7 LITER (VIN F,Y,N). THIS GASKET IS WIDER BY APPROXIMATELY 1/4" AND WILL PROTRUDE THIS AMOUNT BEYOND THE OIL PAN FLANGES ALONG EACH SIDE. THIS WILL ALLOW A VISUAL CHECK FOR AN OUT OF PLACE GASKET AFTER THE ENGINE IS ASSEMBLED. PREVIOUS STYLE GASKETS CAN BE USED FOR SERVICE.

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.