GM part number 999373 is a that includes a buzzer to audibly alert the driver if the headlights are left on when the ignition is turned off. This is a vintage "NOS" (New Old Stock) or new-in-package part that can be used to save a vehicle's battery, and it works with vehicles that have either round glass fuses or plastic spade fuses.
- Function: The package's primary function is to act as a battery-saving device by sounding a buzzer when the ignition is off and the headlights are still on.
- Vehicle compatibility: It is designed for various older General Motors vehicles, particularly classic and muscle cars from the 1960s, 1970s, and 1980s.
- Fuse types: The kit is compatible with older vehicles using either round glass fuses or newer spade-style fuses.
