The Prevost XL2 front turn signal bulb operates with a 3057 size, while the rear turn signal bulb utilizes a 1156 size. The replacement chart covers vehicle production spanning 2000 to 2004.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Prevost XL2 front turn signal uses the 3057 bulb across the 2000-2004 model years.
The 3057 is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament, conforming to ANSI standards recognized in both the United States and Canada.
The dual-filament design of the 3057 allows it to serve both a primary and a secondary lighting function within a single housing, which is a common arrangement in combined stop and turn signal applications.
The rear turn signal on the XL2 uses the 1156 bulb across the 2000-2003 model years.
The 1156 is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base, and also conforms to ANSI standards recognized in the United States and Canada.
The BA15s bayonet base of the 1156 is a single-contact fitting, which distinguishes it from dual-contact bayonet variants and makes it non-interchangeable with those types despite a similar physical profile.
The 3057 and 1156 are not interchangeable with each other, as they differ in base type, filament count, and wattage ratings.
The front and rear turn signal positions on the XL2 use different bulb types, meaning a single replacement bulb cannot serve both positions.