Peterbilt 379 Headlights, Housings & Bezels

Frequently Asked Questions About Peterbilt 379 Headlight Upgrades

What are the clearance requirements for modified or custom 379 headlight buckets?

While standard 1987–2007 Peterbilt 379 housings accept drop-in replacements, trucks running customized aftermarket buckets require physical clearance verification. A modern LED headlight assembly requires a minimum internal mounting depth of 3.5 inches to properly seat the rear heat sinks and cooling fins without binding against the housing wall.

What is the safest method for installing heavier LED assemblies in a 379?

Because LED projector assemblies carry significantly more physical weight than factory glass sealed beams, navigating the tight internal cavity of a 379 headlight bucket can be challenging. To prevent dropping and damaging the new lens, the most efficient installation method is to completely unbolt the headlight assembly arm from the hood. This allows for unrestricted rear access to safely seat the heavier unit and secure the retaining rings.

What does the manufacturer warranty cover on aftermarket LED assemblies?

Our Peterbilt 379 LED headlights feature manufacturer warranties ranging from 1 to 3 years, depending on the specific brand. This coverage protects against manufacturing defects, internal LED diode failure, and weather-seal moisture intrusion. Warranties are strictly voided by physical impact damage, unauthorized wire splicing, or improper installation. We highly recommend retaining your commercial invoice and registering the product entity with the manufacturer to expedite any future claims.