This bulletin revises the schematics found in the "Driveability And Emissions" Sections 6E3-A (Code 32) and 6E3-C7 of the 1990 3.1L Regal Service Manual.
The digital Exhaust Gas Recirculation (EGR) circuits are incorrectly identified. The correct location and circuit identification is shown in the attached illustrations.
Please update your manual accordingly.
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.