Chevrolet Volt front and rear turn signal bulbs utilize 7440NA, 7444NA, and 7443NA sizes, with front positions accommodating multiple bulb options and rear positions requiring 7440NA bulbs. The replacement chart covers 2011 through 2019 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 Chevrolet Volt front turn signal uses three distinct bulb sizes across its production years: 7443NA for 2012-2017, 7444NA for 2011 and 2018, and 7440NA for 2019.
The 7443NA and 7444NA types are both dual-filament T20 wedge bulbs rated at 12V with a 21W primary filament and a 5W secondary filament, making them functionally similar in output despite carrying different part numbers.
The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, which distinguishes it from the dual-filament 7443NA and 7444NA types used in earlier model years.
All three bulb types in these specifications share the T20 wedge base form factor and natural amber glass construction, and all conform to ANSI standards applicable in the United States and Canada.
Natural amber glass produces the amber turn signal color through the glass itself rather than through a colored lens or coating, which is the defining characteristic of the "NA" suffix in these part numbers.
The Chevrolet Volt (2019) is the only model year in these specifications where both the front and rear turn signal positions use the same bulb size, the 7440NA.
The rear turn signal position across 2016-2019 exclusively uses the 7440NA single-filament bulb, while the front position during overlapping years uses dual-filament types, indicating the two positions are not interchangeable despite sharing the T20 base.
Substituting a single-filament 7440NA for a dual-filament 7443NA or 7444NA in front turn signal positions would result in the loss of the secondary 5W filament function, which typically serves a parking or daytime running light role.