Pontiac Sunfire Back Up Light Bulb Size

The Pontiac Sunfire back up light utilizes 3057, 2456, and 3156 bulb sizes depending on the specific version of the component. Data for the bulb sizes covers the range from 1995 to 2005.

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
2000-2005	3057
1999	2456
1998	3156
1995-1997	3057

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3057
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.	2456
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.	3156

Other Locations

Additional Notes

The Pontiac Sunfire uses three distinct back up light bulb types across its model years: the 3057, the 2456, and the 3156.
The 3057 is the most frequently specified bulb across the Sunfire's production run, appearing in the 1995-1997 and 2000-2005 model years.
The 3057 is a dual-filament wedge bulb of the T25 type, rated at 12V with a 27W primary filament and a 7W secondary filament, and it meets ANSI standards for the US and Canada.
The dual-filament design of the 3057 means it is electrically distinct from single-filament alternatives, and substituting a single-filament bulb in its place would result in the loss of one filament's function.
The 1998 Pontiac Sunfire specifies the 3156, a single-filament T25 wedge bulb rated at 12V and 27W, also conforming to ANSI standards for the US and Canada.
Although the 3057 and 3156 share the same T25 wedge form and a 27W primary filament rating, they are not interchangeable due to the 3057 carrying a second filament that the 3156 does not.
The 1999 model year specifies the 2456, which is a festoon-style bulb rated at 12V and classified as a specialty application type under ANSI standards for the US and Canada.
The festoon form of the 2456 differs structurally from the wedge base of the 3057 and 3156, making it physically incompatible with sockets designed for T25 wedge bulbs.