Chevrolet Astro Dome Light Bulb Size

The Chevrolet Astro dome light requires a 211-2 bulb size for the interior lighting system. Available data covers the range from 1986 through 2005 for the specified vehicle.

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
1990-2005	211-2
1986-1988	211-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2

Other Locations

Additional Notes

The Chevrolet Astro uses the 211-2 bulb for its dome light across all model years listed in the specifications, spanning 1986-2005.
The 211-2 is a festoon-type bulb, meaning it is cylindrical in form and mounts by pressing between two spring clips rather than inserting into a socket with a dedicated base pin.
The 211-2 bulb measures 41mm in length and uses an SV8.5 base, which refers to the diameter of the metal end caps on each side of the festoon body.
The bulb operates at 12 volts and draws 12 watts, consistent with standard automotive interior lighting power requirements.
The 211-2 designation follows ANSI standards recognized in both the United States and Canada, placing it within a regulated classification system for bulb interchangeability.
Because the 211-2 is an ANSI-standardized festoon bulb, aftermarket and OEM replacements carrying the same designation are generally considered interchangeable, provided the 41mm length and SV8.5 base specifications are matched exactly.
Festoon bulbs of differing lengths, such as 36mm or 44mm variants, are not compatible with a housing designed for the 41mm 211-2, as the spring clips require a precise fit to maintain electrical contact.