GMC Canyon front turn signal bulbs utilize 7443, 7444NA, or 7443NA bulb sizes, while rear turn signal bulbs use 7443 or 3057 sizes. The replacement chart covers 2004 through 2021 model 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 two primary bulb families across its turn signal positions: the T20 wedge base (7443, 7443NA, 7444NA) and the T25 wedge base (3757NA, 3057). These two families are physically incompatible with each other due to their differing base sizes.
The T20 bulbs (7443, 7443NA, 7444NA) all operate at 12V with a dual-filament output of 21W on the high-intensity filament and 5W on the low-intensity filament, making them electrically equivalent to one another despite their naming differences.
The 3057 bulb, used in the rear turn signal position for 2004-2012 Canyon models, operates at 12V with a 27W/7W dual-filament output, which is a notably higher wattage than the T20 bulbs used in later model years.
The "NA" suffix on bulb types such as 7443NA, 7444NA, and 3757NA denotes natural amber glass, meaning the bulb envelope itself is tinted amber rather than clear. This coloring produces the required amber turn signal output without relying on a colored lens.
The 7443 and 7444NA share the same T20 base and identical 12V/21W/5W electrical ratings. The sole distinction is that the 7444NA has a natural amber glass envelope, while the 7443 uses clear glass.
For the front turn signal on the GMC Canyon, 2004-2012 model years use the T25-based 3757NA, while 2015-2021 model years use T20-based bulbs. These two generations require different bulbs that are not interchangeable.
The rear turn signal on the 2015-2020 Canyon uses the clear-glass 7443, whereas the front turn signal for those same years uses amber-glass variants (7443NA or 7444NA), indicating that the amber coloring requirement shifts between socket positions.
The 3757NA used in the front turn signal position for 2004-2012 does not have a published wattage rating in the specifications, whereas the 3057 used in the rear position for the same generation is rated at 27W/7W.
All bulb types listed for the GMC Canyon turn signals conform to ANSI standards applicable in both the United States and Canada, indicating regulatory compliance across both markets under a unified part number.
The front turn signal for the 2021 Canyon uses the clear-glass 7443, while the 2019-2020 front position uses the amber-glass 7444NA, representing a change in glass type between those model years despite identical electrical ratings.