Oldsmobile Cutlass Salon Back Up Light Bulb Size

The Oldsmobile Cutlass Salon back up light uses 1156 and P21W bulb sizes for the lighting components. Data for the specified vehicle covers the range from 1975 through 1987.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1985-1987	1156
1975-1980	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Oldsmobile Cutlass Salon uses the 1156 bulb for the back up light across all model years listed in the specifications, spanning 1975-1980 and 1985-1987.
The 1156 is an ANSI-standardized bulb recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across manufacturers.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive reverse lighting applications.
The bulb uses a BA15s bayonet base, a single-contact mount where the "s" designation indicates a single pin positioned on the base, distinguishing it from dual-contact bayonet variants.
The 1156 is a single-filament bulb, meaning it serves only one lighting function, which is appropriate for a dedicated back up light rather than a combined stop and tail application.
The BA15s bayonet base requires a quarter-turn insertion to lock into the socket, a mounting style common in automotive lighting that resists vibration loosening.
Because the 1156 has a single contact pin, it is not interchangeable with the 1157, which shares a similar bayonet base style but carries two contact pins for dual-filament operation.