Chevrolet Equinox Turn Signal Bulb Size

Additional Notes

• The T20 wedge form factor is the most prevalent bulb type across the Chevrolet Equinox turn signal specifications, appearing in both front and rear positions across a wide range of model years and in multiple variants including the 7440, 7440NA, 7443, 7443NA, 7444NA, and 7440.
• The "NA" suffix on bulb designations such as 7440NA, 7443NA, and 7444NA indicates natural amber glass, which produces an amber color output from the bulb itself rather than relying on an amber lens to filter a clear bulb.
• The 7443NA and 7444NA are both dual-filament T20 wedge bulbs rated at 12V with a 21W high filament and a 5W low filament, making them functionally interchangeable in most applications despite carrying different ANSI numbers.
• The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W, distinguishing it from the dual-filament 7443NA and 7444NA despite sharing the same T20 wedge base and natural amber glass construction.
• The 1156NA, used on the Chevrolet Equinox front turn signal for 2005-2009, uses a BA15s single-contact bayonet base rather than a wedge base, making it physically incompatible with the T20 wedge socket used in later model years.
• The 2057, used on the rear turn signal for 2005-2009, uses a BAY15d dual-contact bayonet base and is described as a brighter variant of the 1157. Its 12V dual-filament rating of 26.9W/8W differs from the wattage of the T20 and T25 wedge bulbs used in subsequent years.
• The 3157 is a T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament, making it a higher-wattage dual-filament option compared to the T20-based 7443 and 7443NA used in adjacent model years for the rear turn signal.
• For the 2018-2020 Equinox rear turn signal, the correct bulb size depends on the headlamp system installed. The 2019-2020 models use a 7440 with halogen capsule headlamps and a 7444NA with HID headlamps, while the 2018 model reverses this pairing, using a 7440 with HID headlamps and a 7443 with halogen capsule headlamps.
• The front turn signal on the 2021-2024 Equinox uses the 7440NA, a single-filament natural amber wedge bulb, while the 2022 model year is absent from the front turn signal specifications entirely.
• All bulb types listed across both front and rear turn signal positions conform to ANSI standards applicable in both the United States and Canada, as indicated by the ANSI designation noted in each bulb description.