Chevrolet Kodiak front and rear turn signal bulbs use a 1157 size across both positions. The replacement chart covers vehicle production 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 the 1157 bulb for both its front and rear turn signals across the 1997-2009 model years.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, each operating at a different wattage.
The 1157 bulb operates at 12 volts, with filaments rated at 21 watts and 5 watts respectively, making it suitable for combined signaling and parking light functions within one housing.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights to prevent incorrect insertion and ensure proper filament alignment.
The 1157 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications.
Because the front and rear turn signal positions on the Kodiak share the same bulb type, a single 1157 bulb serves as a direct replacement for either position across all listed model years.
The BAY15d base of the 1157 is not interchangeable with single-filament bayonet bases such as the BA15s, as the dual-offset pin configuration is specific to dual-filament applications.