Chevrolet Fleetline front and rear turn signal bulbs utilize a 1154 size across both positions. The replacement chart covers 1950 to 1952 production years with corresponding bulb 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 the specified size for both the front and rear turn signals on the Chevrolet Fleetline across the 1950-1952 model years.
The 1154 is an ANSI-standardized bulb type recognized in both the United States and Canada.
As a dual-filament bulb, the 1154 contains two separate filaments within a single envelope, allowing it to serve more than one lighting function simultaneously.
The 1154 uses a BAY15d bayonet base, a two-pin offset base design that physically locks the bulb into its socket with a twist-and-press motion.
The 1154 is noted as an older variant of the 1157, meaning the two types share a related design lineage but are not the same part and are not directly interchangeable without verification.
The 1154 is rated for both 6V and 12V electrical systems, reflecting its use across vehicles from an era when the automotive industry was transitioning between those two voltage standards.
Because the 1154 and 1157 are related but distinct bulb types, substituting one for the other in the Fleetline's turn signal sockets without confirming socket and voltage compatibility carries a fitment risk.