GM Service Manual Online
For 1990-2009 cars only

OIL SEEPAGE AT OIL FILL CAP REPLACE FAULTY CAP

VEHICLES AFFECTED: 1984 & 1985 'A', 'C' and 'N' Series

If a condition of oil seepage or wicking occurs at the oil fill cap area on the above engines it can be repaired by replacing the cap with a new one, part number 25522656.

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.