Chevrolet Styleline front and rear turn signal bulbs utilize 1154 size bulbs for both locations. The replacement chart covers 1950 to 1952 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 1154 bulb is an ANSI-standardized type recognized in both the United States and Canada, placing it within a regulated specification framework common to North American automotive lighting.
As a dual-filament bulb, the 1154 operates two independent filaments within a single envelope, a design that allows one circuit to serve a lower-intensity function and another to serve a higher-intensity function, such as running light and turn signal duties simultaneously.
The 1154 uses a BAY15d bayonet base, which is an offset twin-pin mount. The offset pin arrangement prevents incorrect insertion by ensuring the bulb seats in only one rotational position.
The 1154 is noted as an older variant of the 1157, meaning the two types share a related design lineage, though they are not directly interchangeable due to differences in voltage and filament ratings.
The 1154 is rated for both 6V and 12V systems, reflecting the transitional period in automotive electrical standards during the early 1950s, when manufacturers were shifting from 6-volt to 12-volt platforms.
The Chevrolet Styleline uses the 1154 bulb for both the front and rear turn signal positions across the 1950-1952 model years, indicating a uniform lighting specification across all three years and both signal locations.