Chevrolet Kodiak front side marker bulbs measure 1157 in size, while rear side marker bulbs measure 194, with replacement specifications detailed in the accompanying chart. The chart covers vehicle production years spanning 1997 to 2009.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Kodiak uses two distinct bulb types across its front and rear side marker positions, with the 1157 assigned to the front and the 194 assigned to the rear for all model years from 1997-2009.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single housing, operating at 21W on the primary filament and 5W on the secondary filament at 12 volts.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to prevent incorrect installation.
The 194 is a T10 miniature wedge bulb, a pinless design that is held in its socket by the tension of the wedge-shaped base rather than by a locking mechanism.
The 194 operates at 12 volts and draws 3.78W, placing it in the low-wattage range typical of small marker and courtesy lighting applications.
Both the 1157 and 194 are ANSI-standardized bulbs recognized in both the United States and Canada, meaning the numerical designations correspond to fixed electrical and physical specifications across manufacturers.
Because the 1157 is a dual-filament type and the 194 is a single-filament type, the two bulbs are not interchangeable with each other, as their base designs, wattage ratings, and filament configurations are fundamentally different.
The front side marker position on the Kodiak (1997-2009) requires the higher-wattage 1157, while the rear side marker position uses the lower-wattage 194, reflecting a difference in the electrical load each circuit is designed to handle.