Effective interim 1985, a new dash-mounted fuel transfer switch was released. This dash-mounted switch features contacts which are self-cleaning, to prevent circuit failure.
The part number for the new switch is 15591149. This new switch can be identified by the sliding contacts, which are visible from the side (see Figure No. 1). The new switch is interchangeable with the former switch.
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.