GMC Canyon Map Light Bulb Size

The GMC Canyon Map Light utilizes bulb sizes 194, 12961, and 212-2 depending on the specific version of the vehicle. Available data for the bulb sizes spans the range from 2004 to 2024.

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
2023-2024	194
2015-2020	12961
2004-2012	212-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2

Other Locations

Additional Notes

The 212-2 is the most historically used map light bulb across the GMC Canyon lineup, appearing in nine model years from 2004 to 2012. It is an ANSI-standard festoon bulb with an SV8.5 base, a 41mm length, and operates at 12V with a 12W power draw.
The 12961 is a Philips-designated part number for a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. It serves as the map light bulb for the GMC Canyon across the 2015-2020 model years.
The 194 is an ANSI-standard T10 miniature wedge bulb rated at 12V and 3.78W. It is specified for the 2023-2024 Canyon map light position.
The festoon and wedge bulb types are not interchangeable. The 212-2 uses an SV8.5 festoon base, while both the 194 and 12961 use T10 wedge bases. These base types require different socket configurations.
Although the 194 and 12961 share the T10 wedge form factor and the same 12V operating voltage, they differ in wattage. The 12961 draws 5W compared to the 194 at 3.78W, which reflects a difference in filament design and light output.
The W2.1x9.5d base designation on the 12961 is a specific IEC-standard wedge base type. While it is physically similar to the 194 wedge base, the two bulbs are not guaranteed to be interchangeable due to differences in wattage and manufacturer specification.
The 212-2 festoon bulb draws 12W, which is notably higher than either of the T10 wedge types used in later Canyon model years. This reflects a generational shift in the electrical load associated with the map light circuit.