For 1990-2009 cars

# ENGINE ROUGH-POSSIBLE OIL IN DISTRIBUTOR (NEW DIST. SHAFT)

#### VEHICLES AFFECTED: 1987 - 88 CARS AND TRUCKS W/5.OL, 5.7L OR 7.4L

* THIS BULLETIN CANCELS AND SUPERSEDES PREVIOUS BULLETIN TO REVISE SYMPTOMS TO INCLUDE SURGE, MISFIRE AND/OR CODE 43.

Some vehicles equipped with 5.0L, 5.7L and 7.4L engines built with distributor, P/N 1103698, may exhibit a rough running engine condition, surge, misfire and/or Code 43. This condition may be the result of oil ascending the distributor shaft and accumulating inside the distributor cap.

If oil is found inside of the distributor cap, wipe the distributor cap, module and distributor base clean with a soft cloth and replace the distributor mainshaft assembly with P/N 10467353 per service procedures in section 6D4 of the appropriate Service Manual.

Use applicable labour time and operation number.

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.