For 1990-2009 cars

# CHIME/HEADLIGHT SWITCH OFF TWILIGHT SENTINEL WIRING

On vehicles equipped with T82 option (Twilight Sentinel) a condition may occur where the headlamp "On" chime may sound even though headlamp switch is in the "Off" position.

This can be caused by the incorrect hook-up of the chime assemble pigtail. The pigtail should be connected to the Twilight Sentinel harness, see illustration for correct hook-up.

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.