1985 C, K, G, and El Camino model trucks equipped with the 4.3L V6 engine (VIN Code N) and built after July 1, 1985, have a new one-piece oil pan gasket that replaces the four-piece gasket previously used. This new one-piece gasket, offers improved oil pan sealing and can be used on all 1985 4.3L engines.
P/N 14081222 PAN GASKET
If the oil pan is removed for any reason, the one-piece gasket should be used when reinstalling the oil pan.
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.