Chevrolet Avalanche Back Up Light Bulb Size

The Chevrolet Avalanche back up light requires a 7441 bulb size for proper installation and function within the rear lighting assembly. Provided information covers the specific range from 2007 to 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 Type	Shop
2007-2013	7441	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament wedge bulb (T20), amber. 12V, 21W.	7441	Check Price

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Additional Notes

The 7441 is the specified back up light bulb size for the Chevrolet Avalanche across the 2007-2013 model years.
The 7441 follows the ANSI standard, which is the recognized bulb classification system used in the United States and Canada.
This bulb uses a wedge-style base in the T20 form factor, meaning it is held in place by the socket itself rather than by pins or a bayonet mechanism.
The 7441 is a single-filament bulb, meaning it serves one lighting function only, which in this application is the reverse light.
The bulb operates at 12 volts and draws 21 watts, which is consistent with standard automotive incandescent reverse lighting.
The 7441 is amber in color. Since reverse lights are typically required to emit white light, direct substitution with alternative bulb types warrants attention to color output compatibility with the lens assembly.