Some early models may experience an intermittent chime operation when ambient light conditions indicate that the headlights should be turned on. This "turlights on" indicator.
To repair this condition, it will be necessary to install the bulb, part no. 25080249 and socket, part no. 12004311, in the "turn lights on" cavity of the instrument cluster.
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.