Peterbilt 587 Back Up Light Bulb Size

The Peterbilt 587 back up light utilizes a 1156 bulb size for the specific lighting component located at the rear of the vehicle. Available data covers the period from 2011 through 2018 for the specified equipment.

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	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Peterbilt 587 uses the 1156 bulb for its back up lights across all listed model years, spanning 2011-2018.
The 1156 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard incandescent automotive backup light applications.
The 1156 is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament types that handle two functions such as braking and running lights simultaneously.
The 1156 uses a BA15s bayonet base, where "BA15s" denotes a bayonet mount with a 15mm base width and a single contact pin, distinguishing it from visually similar bases with offset or dual pins.
The BA15s base type is not interchangeable with the BA15d base, which carries two contact pins. Substituting one for the other is not possible without a socket adapter.