GMC Sierra Dome Light Bulb Size

GMC Sierra dome light bulb sizes include 212-2 and 211-2 specifications for this interior lighting component. The replacement chart covers vehicle production years spanning 1999 to 2014.

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
2014	212-2 (3500 HD only)	Check Price
2007-2013	212-2	Check Price
1999-2006	211-2	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2	Check Price
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2	Check Price

Other Locations

Additional Notes

The 212-2 and 211-2 are both ANSI-standardized festoon bulbs rated at 12 volts and 12 watts, sharing a 41mm length and an SV8.5 base.
A festoon bulb is a cylindrical lamp that mounts by pressing its end caps into spring clips rather than using a threaded or bayonet socket, which is a common configuration for interior dome lighting.
The SV8.5 base designation refers to a festoon base with an 8.5mm cap width, a standard size widely used in automotive interior applications.
The GMC Sierra used the 211-2 bulb for its dome light across the 1999-2006 model years.
Starting with the 2007 model year, the Sierra transitioned to the 212-2 bulb, which continued through 2013.
For the 2014 model year, the 212-2 fitment is specific to the Sierra 3500 HD variant.
Although the 212-2 and 211-2 share identical physical and electrical specifications, they carry distinct ANSI part numbers and are not formally listed as interchangeable within these fitment records.