The Chevrolet B60 front and rear side marker bulbs utilize either 1157 or 194 bulb sizes depending on production specifications. The replacement chart covers vehicle data spanning 1980 to 1991.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet B60 front side marker position uses two bulb types across the 1980-1991 model range: the 1157 and the 194.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with a 21W main filament and a 5W secondary filament. Its dual-filament design allows it to serve both a bright and a dim function within a single housing.
The 194 is a single-filament miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W. Its wedge base is held in place by friction rather than a locking bayonet mechanism, making it physically and electrically incompatible with sockets designed for the BAY15d base of the 1157.
On the Chevrolet B60, the front side marker uses the 194 bulb for model years 1982-1985, while all other years in the 1980-1991 range use the 1157.
The rear side marker position shows a more varied pattern of bulb assignments across the same model range, with the 1157 and 194 alternating across multiple individual years rather than grouping into a single continuous block for either type.
Because the 1157 and 194 use fundamentally different base types, a socket built for one will not accept the other without modification, making year-specific fitment verification necessary when sourcing replacement bulbs for either the front or rear side marker positions.
Both the 1157 and 194 are ANSI-standardized bulbs recognized in both the United States and Canada, meaning bulbs sold under these designations conform to a consistent specification regardless of manufacturer.