FUEL LINE 'O' RING LEAKS FUEL ADDITIVE AFFECT

Model and Year 1982-85 MODELS

TO: ALL CHEVROLET DEALERS

The fuel line 'O' rings (feed and return lines) used on many 1982-85 engine applications are made of Viton. The Viton 'O' rings (Viton is a type of rubber) are brown in color. They are less affected than rubber by the additives used in many of the fuel blends available today and therefore should not be substituted with other type rubber 'O' rings. The following are the part numbers used on the above applications:

Group P/N Usage ----- --- ----- 3:163 22514722 Feed Line

3:163 22516256 Return Line

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.