Chevrolet Avalanche Dome Light Bulb Size

The Chevrolet Avalanche dome light requires a bulb size of 212-2 for the interior lighting system. Data for the specified component covers the range 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 Type	Shop
2007-2013	212-2	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2	Check Price

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Additional Notes

The Chevrolet Avalanche dome light uses the 212-2 bulb across all listed model years, spanning 2007-2013.
The 212-2 is an ANSI-standardized bulb type, meaning its specifications are governed by a formal industry standard recognized in both the United States and Canada.
The 212-2 is a festoon-style bulb, which is a cylindrical form factor held in place by spring clips at each end rather than a socket with a plug-in base.
The bulb measures 41mm in length, which is the end-to-end span relevant to festoon fitment, as the spring clips must match this figure for the bulb to seat correctly.
The 212-2 uses an SV8.5 base, a designation that refers to the 8.5mm cap width on the festoon ends, which must correspond to the vehicle's lamp housing contacts.
The bulb operates at 12 volts and draws 12 watts, both standard values for automotive interior lighting powered by a typical vehicle electrical system.
Because the 212-2 shares the festoon form factor with several other bulb types, substitution requires matching all three physical parameters, the 41mm length, the SV8.5 base, and the 12V/12W electrical rating, to avoid fitment or electrical incompatibility.