Chevrolet Equinox Brake Bulb Size

The Chevrolet Equinox brake component utilizes 7440, 7443, 2458, 3157, and 2057 bulb sizes according to the provided data. Information for the specified vehicle covers the range from 2005 to 2020.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2019-2020	7440
2018	7440 (With HID Headlamps)
2018	7443 (With Halogen Capsule Headlamps)
2016-2017	7443
2010-2015	3157
2005-2009	2057

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440
ANSI standard (US & Canada). Dual-filament wedge bulb (T20). 12V, 21W/5W.	7443
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057

Other Locations

Additional Notes

The Chevrolet Equinox brake bulb specifications span the 2005-2020 model years and reference four distinct bulb types: 7440, 7443, 3157, and 2057.
The 3157 is the most frequently specified bulb across this range, covering the 2010-2015 model years. It is a dual-filament T25 wedge bulb rated at 12V with a 27W high-filament and 7W low-filament output, conforming to ANSI standards for the US and Canada.
The 2057 is specified for the 2005-2009 model years. It uses a BAY15d bayonet base rather than a wedge base, which distinguishes it physically from the other bulbs in these specifications. It operates at 12V with filament ratings of 26.9W and 8W and is noted as a brighter variant of the 1157 bulb.
The 7443 covers the 2016-2017 model years and one configuration of the 2018 Equinox. It is a dual-filament T20 wedge bulb rated at 12V, 21W/5W, and follows the same ANSI standard as the other types listed.
The 7440 is specified for the 2019-2020 model years and one configuration of the 2018 Equinox. Unlike the 7443, it is a single-filament T20 wedge bulb rated at 12V, 21W. Both the 7440 and 7443 share the T20 wedge form factor, but their filament count differs.
The 2018 Chevrolet Equinox is the only model year in these specifications where brake bulb fitment depends on the headlamp system installed. Vehicles equipped with HID headlamps use the 7440, while those equipped with halogen capsule headlamps use the 7443. Installing the incorrect bulb for a given headlamp configuration represents a fitment mismatch.
The 7440 and 7443 share the T20 wedge base and are physically similar, but the 7443 carries a second filament for dual-intensity operation. This electrical difference means the two types are not interchangeable in applications that require dual-filament function.
The 3157 and 7443 are both dual-filament bulbs, but they use different base types, T25 and T20 respectively, making them physically incompatible with each other's sockets despite serving similar electrical roles.
The 2057 is the only bulb in these specifications that uses a bayonet-style base. This base type is mechanically distinct from the wedge bases used by the 7440, 7443, and 3157, and the socket designs are not interchangeable.
All four bulb types in these specifications conform to ANSI standards applicable to the US and Canadian markets and operate on a 12V electrical system, consistent with standard automotive electrical architecture.