For 1990-2009 cars

# COLD START INJECTOR 'O' RING REPLACEMENT

#### VEHICLES AFFECTED: 1985-87 VEHICLES EQUIPPED WITH 2.8, 5.0 AND 5.7L ENGINES

Some 1985-87 vehicles may experience a condition where cold start injector o-ring(s) split or break when servicing the fuel rail assembly. Anew service o-ring package, P/N 17111954, is now available through GMSPO. This package contains the cold start valve o-ring seal (4), cold start body o-ring seal (3) and the cold start tube o-ring seal (5) as shown below in Figure 1.

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.