Peterbilt 587 Tail Light Bulb Size

The Peterbilt 587 tail light requires a 1157 bulb size for proper installation and function within the rear lighting assembly. Available data covers the period from 2011 through 2018 for the specified vehicle and component.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2011-2018	1157

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

Other Locations

Additional Notes

The Peterbilt 587 uses the 1157 bulb for its tail lights across the 2011-2018 model years.
The 1157 is an ANSI-standardized bulb type, meaning its specifications are governed by a formal industry standard recognized in both the United States and Canada.
The 1157 is a dual-filament bulb, which allows it to serve two lighting functions within a single unit, typically combining a lower-intensity running light with a higher-intensity brake or turn signal output.
The 1157 operates on a 12-volt electrical system and draws 21 watts on its high-intensity filament and 5 watts on its low-intensity filament.
The 1157 uses a BAY15d bayonet base, a two-pin offset base design that physically prevents incorrect insertion by positioning the two pins at different heights along the base.
The BAY15d base is specific to dual-filament applications, and single-filament bayonet bulbs with a BAY15s base are not interchangeable with the 1157 despite sharing a similar physical form.