Chevrolet B7 front and rear side marker bulbs utilize a 1157 bulb size across both positions. The replacement chart covers vehicle production spanning 1993 to 2002.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet B7 uses the 1157 bulb for both the front and rear side marker positions across the full 1993-2002 model range.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, one rated at 21 watts and the other at 5 watts.
It operates on a 12-volt electrical system, which is standard for passenger vehicles in North America.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect insertion by positioning the two pins at different heights along the base.
The 1157 conforms to ANSI standards and is recognized in both the United States and Canada, reflecting a standardized specification shared across North American markets.
Because the same bulb number applies to both the front and rear side marker positions without variation across any model year, the 1157 is the sole side marker bulb type for the B7 throughout its entire listed production span.
The BAY15d base is not interchangeable with single-pin bayonet bases such as the BA15s, which is a fitment distinction relevant when sourcing a replacement, as physically similar bulbs with different base configurations will not seat correctly.