Chevrolet Del Ray front and rear turn signal bulbs both use 1034 size bulbs. The replacement chart covers 1957 to 1958 vehicle 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 1034 bulb is an ANSI-standardized type used in both the United States and Canada, operating at 12 volts with a dual-filament design rated at 21/5 watts.
The dual-filament construction of the 1034 allows it to serve two lighting functions within a single housing, with the higher-wattage filament handling the turn signal function and the lower-wattage filament serving a secondary role.
The 1034 uses a BAY15d bayonet base, a two-pin offset base type where the two pins are positioned at different heights to ensure correct orientation during installation.
The 1034 is a variant of the more widely known 1157 bulb, meaning the two types share a similar design lineage, though they are not necessarily interchangeable due to differences in filament wattage and base pin specifications.
The Chevrolet Del Ray uses the 1034 bulb across all four turn signal positions, front and rear, for both the 1957 and 1958 model years, indicating a uniform fitment across the vehicle's turn signal system.
Because the 1034 and 1157 are related but distinct variants, substituting one for the other without confirming base pin compatibility and wattage tolerances carries a risk of incorrect fitment or improper circuit behavior.