GMC Sierra Glove Box Bulb Size

GMC Sierra glove box bulb uses a 194 size. The replacement chart covers 1999 to 2006 vehicle production years with corresponding bulb size specifications.

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
1999-2006	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The GMC Sierra (1999-2006) uses the 194 bulb size for the glove box across all listed model years.
The 194 bulb is an ANSI-standardized type recognized in both the United States and Canada, meaning it follows a defined set of electrical and physical specifications rather than varying by manufacturer.
It belongs to the T10 miniature wedge family, a form factor that uses a wedge-shaped base instead of a metal contact pin, allowing the bulb to be held in place by the socket walls alone.
The 194 operates at 12 volts, which is consistent with standard automotive electrical systems.
Its power rating of 3.78 watts reflects a low-draw design typical of interior courtesy and illumination applications.
Because the 194 is an ANSI-standardized bulb, it is produced by multiple manufacturers and is widely available as a direct replacement without modification to the socket.
The T10 wedge base is also shared by several other bulb types in the same family, so confirming the full designation (194) rather than relying on the base type alone is relevant when selecting a replacement to avoid wattage or voltage mismatches.