This bulletin serves to update Chart C-3, "Canister Purge Valve Check" in Section 6E3-C3-5, "Driveability And Emissions" in the 1987 through 1989 Service Manuals with 2.3L "N" (VIN D and A) applications.
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.