GMC Acadia front turn signal bulbs utilize 7444NA, 7443NA, or 12272NA sizes, while rear turn signal bulbs use 7440 size. The replacement chart covers 2007 through 2019 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 Acadia front turn signal uses three distinct bulb types across its model years: the 12272NA, 7443NA, and 7444NA.
The 7443NA and 7444NA are both ANSI-standardized dual-filament T20 wedge bulbs rated at 12V with a 21W/5W output, and both feature natural amber glass rather than a clear envelope with a colored lens.
Despite sharing the same T20 wedge base, voltage rating, wattage, and natural amber glass construction, the 7443NA and 7444NA carry different part numbers, which indicates a fitment distinction that warrants attention when sourcing a replacement.
The GMC Acadia (2013-2015, 2017-2018) front turn signal takes the 7443NA, while the 2016 and 2019 model years take the 7444NA instead.
The 12272NA is designated by an OEM part number rather than an ANSI standard number, which means it originates from a manufacturer-specific classification system rather than a universal industry code.
The GMC Acadia (2007-2012) front turn signal uses the 12272NA, a natural amber glass bulb rated at 12V, for which no wattage figure is listed in the specifications.
The 7440 is a single-filament T20 wedge bulb rated at 12V and 21W, and its single-filament design distinguishes it functionally from the dual-filament 7443NA and 7444NA used in the front position.
The rear turn signal on the 2017-2019 Acadia uses the 7440, meaning the front and rear turn signal positions on those model years require different bulb types and are not interchangeable.
The natural amber glass construction of the 7443NA, 7444NA, and 12272NA produces an amber output from the bulb itself, independent of any amber coloring in the surrounding lens assembly.