The Pontiac G3 front turn signal requires a 2357NA bulb size while the rear turn signal uses a 1156NA bulb size. The replacement chart covers 2009 to 2010 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Pontiac G3 uses two distinct bulb types across its front and rear turn signal positions for the 2009-2010 model years, with each position requiring a specific and non-interchangeable bulb.
The 2357NA is a dual-filament bulb rated at 12V with a wattage split of 26.9W and 8W across its two filaments, which allows it to serve both a primary and secondary lighting function from a single unit.
The 1156NA is a single-filament bulb rated at 12V and 21W, a configuration that supports only one lighting function per bulb.
Both the 2357NA and 1156NA carry ANSI standard designations recognized in the United States and Canada, meaning their physical and electrical characteristics conform to a defined industry specification.
The 2357NA uses a BAY15d bayonet base, which is an offset dual-contact base. This base type physically prevents it from being seated in a socket designed for a single-contact bayonet fitting.
The 1156NA uses a BA15s bayonet base, a single-contact base that is not compatible with the BAY15d socket used by the 2357NA, making the two bulbs non-interchangeable despite their similar appearance.
Both bulb types feature natural amber glass, which produces the amber color of the turn signal output directly through the glass rather than relying on a colored lens or housing to filter a clear light source.
The Pontiac G3 front turn signal uses the 2357NA for both the 2009 and 2010 model years, and the rear turn signal uses the 1156NA across the same span, indicating no change in bulb specification between those two years.