Chevrolet Classic Dome Light Bulb Size

The Chevrolet Classic dome light requires a unique 561 bulb size for the interior lighting system. 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 Type	Shop
2004-2005	561	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561	Check Price

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Additional Notes

The 561 bulb is the sole dome light bulb type listed for the Chevrolet Classic, covering the 2004-2005 model years.
The 561 is classified as a festoon bulb, a form factor characterized by a cylindrical body with flat metal end-cap contacts at each end rather than a screw or bayonet base.
The 561 has a rated length of 44mm, which is the span between its two end contacts and determines physical fitment within the dome light housing.
The bulb operates at 12 volts and draws 12 watts, consistent with standard automotive low-voltage electrical systems.
The 561 designation follows ANSI standardization, meaning the bulb specification is recognized across both the United States and Canada.
Because festoon bulbs rely on contact pressure at both ends, the 44mm length is a critical fitment factor; a bulb of a different length may not make reliable electrical contact within the same housing.