Chevrolet Avalanche Brake Bulb Size

The Chevrolet Avalanche brake light utilizes 3047 and 3057 bulb sizes for the rear lighting system. Information provided covers the span of time from 2007 through 2013.

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
2011-2013	3047
2007-2010	3057

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.	3047
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3057

Other Locations

Additional Notes

The Chevrolet Avalanche uses two distinct brake bulb types across its 2007-2013 model years: the 3047 and the 3057, both conforming to ANSI standards recognized in the United States and Canada.
Both the 3047 and 3057 are T25 wedge-base bulbs operating at 12 volts, which is standard for automotive electrical systems.
The 3057 is a dual-filament bulb rated at 27W and 7W, meaning it supports two brightness levels within a single housing, a design commonly used when one bulb serves both brake and running light functions.
The 3047 is a single-filament bulb rated at 27W, dedicated to a single output level with no secondary filament for a running light function.
The Chevrolet Avalanche (2007-2010) uses the 3057 bulb for the brake light position, while the 2011-2013 model years use the 3047.
Although both bulbs share the T25 wedge base and 12V operating voltage, the difference in filament count between the 3047 and 3057 makes them non-interchangeable without potential loss of intended lighting function.