Oldsmobile Vista Cruiser front and rear side marker bulbs utilize 194, 194NA, and 1034NA bulb sizes depending on location and model variation. The replacement chart covers 1968 through 1975 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 bulb type 194 is the most frequently specified size across the Oldsmobile Vista Cruiser side marker data, appearing in both front and rear positions for the 1970-1975 model years, as well as the rear position for 1969.
The 194 is classified under the ANSI standard for the US and Canada as a miniature wedge bulb in the T10 form factor, operating at 12 volts with a power draw of 3.78 watts.
The T10 wedge base design means the bulb is held in its socket by the tension of the base itself, with no separate locking mechanism or bayonet pins required for retention.
The 1969 Oldsmobile Vista Cruiser front side marker departs from the 194 by specifying the 194NA, which shares the same T10 wedge form factor, voltage, and wattage as the 194 but features natural amber glass rather than a clear envelope.
Because the 194NA and 194 share identical electrical and physical specifications, the distinction between them is purely optical, with the amber tint built into the glass of the 194NA rather than achieved through a colored lens or housing.
The 1968 Oldsmobile Vista Cruiser front side marker uses the 1034NA, a dual-filament bulb with a BAY15d bayonet base rated at 12 volts and 21/5 watts, which represents a fundamentally different construction from the single-filament T10 wedge types used in all other positions.
The BAY15d bayonet base of the 1034NA requires a socket with two offset pins, making it physically incompatible with the wedge-type sockets used by the 194 and 194NA.
The 1034NA is noted as a variant of the 1157, a widely recognized dual-filament automotive bulb, with the NA designation again indicating natural amber glass construction.
The dual-filament nature of the 1034NA means it carries two separate tungsten filaments within one envelope, rated at 21 watts and 5 watts respectively, a configuration not present in any other bulb specified for this vehicle.
The rear side marker position on the 1968 Vista Cruiser uses the standard 194, meaning the front and rear positions for that model year draw on two entirely different bulb families with incompatible bases and filament configurations.