Chevrolet Classic Tail Light Bulb Size

The Chevrolet Classic tail light requires a 3057 bulb size for proper installation and function. Data for the specific component covers the range from 2004 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
2004-2005	3057

Bulb Specifications

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

Other Locations

Additional Notes

The 3057 is an ANSI-standardized bulb used in the United States and Canada, operating at 12 volts with a dual-filament design rated at 27 watts for the high-intensity filament and 7 watts for the low-intensity filament.
The dual-filament configuration of the 3057 allows a single bulb to serve two lighting functions simultaneously, typically stop and tail light operation, within one housing.
The 3057 follows the T25 wedge form factor, a designation that refers to the shape and base type of the bulb rather than a separate product line.
The Chevrolet Classic uses the 3057 bulb for the tail light position across the 2004-2005 model years.
The 3057 wedge base design means the bulb is held in place by tension from the socket rather than a bayonet or screw mechanism, which affects socket compatibility when substituting with other bulb types.
Because the 3057 is a dual-filament bulb, single-filament substitutes are not interchangeable without loss of one lighting function, regardless of physical fitment.