Some vehicles with cold start injectors may experience a condition where cold start injector O-ring(s) split or break when servicing the fuel rail assembly. A new service O-ring package, P/N 17111954, is now available through GMSPO. This package contains the cold start valve O-ring seal, cold start body O-ring seal, and the cold start tube O-ring seal.
Use applicable Labor Operation and Time.
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.