Chevrolet City Express front and rear side marker bulbs utilize 3457 and 3157 bulb sizes respectively. Replacement chart data covers 2015 through 2018 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 City Express uses the 3457 bulb for the front side marker position across the 2015-2018 model years.
The rear side marker position across the same 2015-2018 span calls for the 3157 bulb.
Both the 3457 and 3157 are dual-filament wedge bulbs built to the T25 form factor, meaning each contains two separate filaments within a single housing, one for each brightness level.
Both bulbs operate at 12 volts with a wattage rating of 27W on the high filament and 7W on the low filament, a configuration typical of bulbs that serve combined stop and marker functions.
The 3457 and 3157 share the same ANSI standardization for the US and Canadian markets, the same T25 wedge base, and the same 12V/27W/7W electrical ratings, making their specifications nearly identical on paper.
Despite their near-identical specifications, the 3457 and 3157 are not confirmed as interchangeable within this vehicle, as the front and rear positions are each assigned a distinct part number in the fitment data.