The GMC Canyon parking light utilizes 7443, 7444NA, 7443NA, and 3757NA bulb sizes depending on the specific version of the vehicle. Available data for the lighting components covers the range from 2004 through 2020.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The GMC Canyon front parking light position uses dual-filament wedge bulbs across all listed model years, meaning each bulb contains two separate filaments operating at different wattages within a single housing.
The 7443, 7443NA, and 7444NA bulbs are all T20 wedge types rated at 12V with a 21W/5W filament configuration, making them electrically equivalent despite their different part numbers.
The key distinction between the 7443 and its NA-suffix counterparts is the glass envelope: the 7443NA and 7444NA use natural amber glass, while the 7443 uses clear glass. This difference affects the color output of the light and is relevant to compliance with regulations requiring amber parking lights.
The 3757NA is a T25 wedge bulb, which is physically larger than the T20 form factor used by the 7443 series. T20 and T25 bulbs are not interchangeable due to the difference in wedge base width.
The GMC Canyon (2004-2012) front parking light position calls for the 3757NA, a natural amber T25 wedge bulb rated at 12V.
A fitment split occurs within the Canyon lineup: the 2015-2020 model years use T20 wedge bulbs from the 7443 series, while the 2004-2012 model years use the T25-based 3757NA. Substituting one for the other would result in an incorrect fit.
Within the 2015-2020 range, some years specify the clear 7443 while others specify the amber 7443NA or 7444NA. Installing a clear 7443 in a position specified for an NA-suffix bulb would alter the emitted light color.
All four bulb types listed are ANSI-standardized for the US and Canadian markets, meaning they conform to defined electrical and physical tolerances under that standard.