For 1990-2009 cars

# CCC(FUEL IN CRANKCASE) DIAGNOSIS

GR.6C CCC DIAGNOSIS-FUEL IN CRANKCASE IF ENGINE OIL IS CONTAMINATED WITH GASOLINE DUE TO FLOODING, YOU MAY GET ERRONEOUS DWELL READING BECAUSE OF FUEL VAPOR BEING DRAWN-IN THROUGH PCV SYSTEM.

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.