GMC G1500 Dome Light Bulb Size

The GMC G1500 dome light requires a 211-2 bulb size for the interior illumination system. Available data covers the span from 1964 through 1995 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
1979-1995	211-2
1964-1966	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 GMC G1500 dome light uses the 211-2 bulb across all model years listed in the specifications, spanning 1964-1966 and 1979-1995.
The 211-2 is a festoon-type bulb, meaning it is cylindrical in shape and mounts by pressing lengthwise between two spring clips rather than inserting into a socket.
The 211-2 carries an SV8.5 base designation, which refers to the diameter of the metal end caps on either side of the festoon body.
The bulb has a specified length of 41mm, a figure that is relevant to fitment since festoon bulbs must physically span the distance between the two retaining clips in the dome light housing.
The 211-2 operates at 12 volts and 12 watts, which is consistent with standard automotive electrical systems.
The 211-2 conforms to ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary or regional-only part.
Because the GMC G1500 dome light housing is designed around the 41mm festoon format, substituting a festoon bulb of a different length would result in an improper fit against the spring clips.