The Oldsmobile LSS brake light requires bulb size 3057 or 2057 depending on the specific version of the vehicle. Data for the lighting components covers the range from 1996 to 1999.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Oldsmobile LSS uses three distinct bulb types across its brake lighting system: the 3057, 2057, and 1156, all of which conform to ANSI standards applicable in both the United States and Canada.
The 3057 is a dual-filament wedge bulb in a T25 form factor, rated at 12V with a 27W high filament and a 7W low filament. This type serves the brake lights on the Oldsmobile LSS for model years 1997-1999.
The 2057 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 26.9W high filament and an 8W low filament. It is a brighter variant of the 1157 bulb type. The LSS uses this bulb exclusively for the 1996 model year brake lights.
The 1156 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W. It is the designated bulb for the Center High Mount Stop Light across all Oldsmobile LSS model years from 1996-1999.
The brake light bulb specification for the Oldsmobile LSS changed between the 1996 and 1997 model years, shifting from the BAY15d-based 2057 to the T25 wedge-style 3057. These two bulbs use different base types and are not interchangeable despite both being dual-filament 12V units.
The BAY15d base of the 2057 and the BA15s base of the 1156 are both bayonet-style mounts, but they differ in pin configuration. The BAY15d has offset dual pins to support dual-filament operation, while the BA15s has a single pin suited to single-filament use. The two bulbs are not interchangeable.
The T25 wedge base of the 3057 is physically distinct from the bayonet bases used by the 2057 and 1156, making cross-substitution between the 3057 and either of the other two bulb types mechanically incompatible.