GMC Canyon front and rear side marker bulbs utilize 7443, 12961, 3757NA, and 3057 bulb sizes depending on location and model variation. The replacement chart covers 2004 through 2020 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.
The GMC Canyon uses three distinct bulb types across its front and rear side marker positions: the 7443, 12961, and 3757NA for the front, and the 7443 and 3057 for the rear.
The 7443 is an ANSI-standard dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W high filament and 5W low filament. It serves as the rear side marker bulb for the 2015-2020 Canyon and also as the front side marker bulb for the 2020 model year.
The 12961 is a Philips part number designation for a single-filament miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base and rated at 12V, 5W. It is the front side marker bulb for the 2015-2019 Canyon.
The 3757NA is an ANSI-standard dual-filament wedge bulb in the T25 form factor, distinguished by its natural amber-tinted glass envelope. It is the front side marker bulb for the 2004-2012 Canyon.
The natural amber glass of the 3757NA produces a colored output without relying on a tinted lens, which is a functional characteristic relevant to housing compatibility.
The 3057 is an ANSI-standard dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W high filament and 7W low filament. It is the rear side marker bulb for the 2004-2012 Canyon.
The front side marker position of the GMC Canyon uses three different bulb types across its model years, meaning front side marker bulbs are not interchangeable across all generations.
The 7443 (T20) and the 3057 or 3757NA (T25) belong to different physical form factors, and substituting one for the other in a given housing is not supported by these specifications.
The 12961 is a single-filament T10 bulb, while the 7443 used in the same front side marker position for the 2020 model year is a dual-filament T20 bulb, indicating a housing change between the 2019 and 2020 model years for that position.
The rear side marker position transitioned from the 3057 to the 7443 between the 2012 and 2015 Canyon, representing a change in both wattage rating and bulb form factor for that position.