The Peterbilt 335 front and rear turn signal bulbs both utilize a 2057 size bulb for proper operation. The replacement chart covers vehicle production spanning 2005 to 2009.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Peterbilt 335 uses the 2057 bulb in both its front and rear turn signal positions across the 2005-2009 model years.
The 2057 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical standards shared across North American markets.
The 2057 is a dual-filament bulb, which means it contains two separate filaments within a single envelope, allowing it to serve more than one lighting function from a single socket.
The 2057 uses a BAY15d bayonet base, a two-pin offset base design that physically prevents incorrect insertion by positioning its two pins at different heights.
The 2057 operates at 12 volts, consistent with the standard electrical system voltage found in most automotive and commercial truck applications.
The 2057 carries a wattage rating of 26.9W on its high-intensity filament and 8W on its low-intensity filament, reflecting the different power draws associated with each of its two filaments.
The 2057 is described as a brighter variant of the 1157, a widely used dual-filament bulb with the same BAY15d base, indicating the two types share physical compatibility but differ in light output on the high-intensity filament.
Because the 1157 and 2057 share the same BAY15d base, substitution between the two is physically possible, though the difference in filament wattage means the two are not electrically identical.