GMC Envoy XL Dome Light Bulb Size

The GMC Envoy XL dome light requires a 194 bulb size for proper installation and function within the interior lighting system. Data for the specified component covers the period from 2002 through 2006.

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
2002-2006	194

Bulb Specifications

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

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Additional Notes

The GMC Envoy XL uses the 194 bulb size for the dome light across the 2002-2006 model years.
The 194 bulb follows the ANSI standard, meaning it conforms to a recognized North American specification used in both the United States and Canada.
It belongs to the T10 form factor, which refers to a miniature wedge-base bulb. The wedge base design means the bulb is held in place by the socket gripping the glass envelope directly, with no separate metal base or pins.
The 194 bulb operates at 12 volts, which is consistent with standard automotive electrical systems.
Its rated wattage is 3.78W, placing it in the low-power range typical of interior courtesy and dome lighting applications.
The T10 wedge form factor is shared by a number of bulb types across different part numbers, so substitutions should be verified against both the voltage and wattage ratings, not the physical form alone.