Chevrolet B7 front and rear turn signal bulbs utilize a 1157 size across both locations. The replacement chart covers vehicle production spanning 1993 to 2002.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet B7 uses the 1157 bulb for both the front and rear turn signals across the 1993-2002 model years.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, allowing it to serve two distinct lighting functions at different wattages.
The 1157 operates at 12 volts and draws 21 watts on its high-intensity filament and 5 watts on its low-intensity filament, reflecting its dual-purpose design.
The 1157 uses a BAY15d bayonet base, which features two offset pins at different heights to ensure the bulb is seated in only one rotational orientation, preventing incorrect filament alignment.
The 1157 conforms to ANSI standards recognized in both the United States and Canada, placing it within a standardized classification system that governs its electrical and physical properties.
Because the same 1157 bulb is specified for both the front and rear turn signal positions on the Chevrolet B7, the two positions share a common replacement part throughout the entire 1993-2002 production span.