GMC Typhoon front and rear turn signal bulbs both use a 2057 size. The replacement chart covers 1992 to 1993 model years with bulb specifications for turn signal applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The GMC Typhoon uses the 2057 bulb across both front and rear turn signal positions for the 1992-1993 model years.
The 2057 is an ANSI-standardized bulb, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 2057 is a dual-filament bulb, which means it contains two separate filaments within a single housing, allowing it to serve more than one lighting function simultaneously.
The 2057 uses a BAY15d bayonet base, a two-pin offset base design that physically prevents incorrect insertion by offsetting the two pins at different heights.
The 2057 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles and light trucks of this era.
The 2057 carries a wattage rating of 26.9W on its high-filament circuit and 8W on its low-filament circuit, reflecting the difference in brightness between its two operating modes.
The 2057 is described as a brighter variant of the 1157 bulb, indicating the two types share the same BAY15d base and are physically interchangeable in many applications, though the 2057 produces greater output on its high-filament circuit.