Oldsmobile Bravada Back Up Light Bulb Size

The Oldsmobile Bravada back up light utilizes bulb sizes 3157, 2458, 2456, 2356, P21W, and 1156. Data for the provided specifications covers the range from 1991 through 2004.

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
2002-2004	3157
2001	2456
2000	2356
1998-1999	2456
1996-1997	1156
1991-1994	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.	2456
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V.	2356
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The back up light bulb specifications for the Oldsmobile Bravada span the 1991-2004 model years, with four distinct bulb types used across that range: the 1156, 2356, 2456, and 3157.
The 1156 bulb is the most frequently specified type across the Bravada lineup, covering the 1991-1994 and 1996-1997 model years. It is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W.
The 3157 bulb, used on the 2002-2004 Bravada, is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament. Its dual-filament design distinguishes it from the single-filament 1156 used in earlier model years.
The 2456 is an ANSI-standard festoon bulb rated at 12V and is designated for specialty applications. It is specified for the 1998-1999 and 2001 Bravada model years.
The 2356 bulb, specified for the 2000 Bravada, is a dual-filament bulb with a BAY15d bayonet base rated at 12V. The BAY15d base features offset pins, which prevents it from being interchanged with the BA15s base found on the 1156 bulb.
The BA15s base of the 1156 and the BAY15d base of the 2356 are physically incompatible despite their similar bayonet-style mounting. Substituting one for the other is not possible without a socket adapter.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.
The 2456 festoon bulb uses a cylindrical form factor held in place by end caps rather than a bayonet or wedge base, making it physically distinct from all other bulb types listed in these specifications.
The Bravada transitioned from the 2456 festoon bulb in 1999 to the 2356 BAY15d bayonet bulb in 2000, then back to the 2456 in 2001, indicating that the back up light socket configuration was not consistent across those three consecutive model years.
The shift to the 3157 wedge bulb beginning with the 2002 Oldsmobile Bravada represents a change to a base type entirely different from the bayonet and festoon configurations used in prior model years, and the 3157 socket is not interchangeable with those earlier designs.