Chevrolet City Express Tail Light Bulb Size

The Chevrolet City Express tail light requires bulb size 2458 or 3157 depending on the specific configuration of the vehicle. Data for the tail light covers the range from 2015 to 2018.

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	US Type	EU Type	Shop
2015-2018	3157	P27/7W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157	Check Price

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Additional Notes

The Chevrolet City Express uses the 3157 bulb across its 2015-2018 model years for the tail light position.
The 3157 is an ANSI-standardized bulb type, meaning its specifications are governed by a formal industry standard recognized in both the United States and Canada.
The 3157 follows the T25 wedge form factor, which refers to a wedge-base bulb with a 25mm body width, secured by friction rather than a bayonet or screw mechanism.
Operating voltage is rated at 12V, consistent with standard automotive electrical systems.
The 3157 carries a dual-filament design, with one filament rated at 27W and a second rated at 7W, allowing a single bulb to serve two distinct lighting functions, typically stop and tail, within one housing.
The higher 27W filament corresponds to the brighter stop light function, while the lower 7W filament serves the dimmer running or tail light function.
The dual-filament construction of the 3157 means it is not directly interchangeable with single-filament bulbs of similar physical size, as substituting a single-filament type would disable one of the two lighting functions.
The 3157 shares its T25 wedge base with several related bulb types, such as the 3156, but the 3156 is a single-filament variant and is not a functional equivalent for this application.