Peterbilt 379 Sleeper & Related

Discover our premium Peterbilt 379 sleeper and related collections. Explore various side, roof, and rear accessories alongside superior repair parts. Look no further than 4 State Trucks for your aftermarket needs.

Find Aerodynamic Sleeper Fairings for Your Truck

This product lineup offers everything you need to upgrade, repair, or customize your sleeper cab. From side accessories to rooftop and repair parts, these high-quality components fit seamlessly with the truck's classic design, ensuring top performance and style. Ideal for Peterbilt models 379, 378, and 389, this line helps personalize and maintain your sleeper cab.

Frequently Asked Questions About Peterbilt 379 Sleeper & Related

What kinds of products are included in this category?

This category covers sleeper boxes and sleeper-related components designed for the Peterbilt 379, including sleeper panels, exterior sleeper skirts and fairings, interior trim pieces, and other accessories used to build out, repair, or upgrade the sleeper compartment on this model. Since the 379 was produced over a long run with several cab and sleeper configurations, it's important to confirm exactly which sleeper length and body style your truck has before ordering.

How do I know if a sleeper part will fit my specific 379?

Fit depends on your truck's sleeper length, roof height, and body style, all of which varied across production years. Before purchasing, check your truck's VIN or existing sleeper dimensions and compare them to the fitment notes listed on the product page. If you're unsure, our team can help you cross-reference measurements to make sure the part matches your configuration.

What materials are these sleeper components made from, and what finish options are available?

Sleeper panels and related parts are typically offered in aluminum or fiberglass, depending on the specific piece and its original equipment style. Some parts come primed or unpainted so they can be finished to match your truck's paint, while others may be available pre-finished. Check the individual product listing for details on material and finish, since this can vary by item.

Will I need professional help to install these parts, or can I do it myself?

Installation complexity varies by part. Smaller trim and interior pieces are often straightforward for someone comfortable with basic hand tools, while larger structural sleeper panels or skins may require cutting, fitting, and bonding or riveting work that's best handled by someone with body shop experience. If a listing includes installation instructions or hardware, that's a good sign of what's involved, but for major sleeper body work, we recommend having an experienced installer handle the job.

Are these parts made for a direct OEM replacement, or will some fitting/adjustment be needed?

Many of these components are designed to match original Peterbilt 379 sleeper dimensions and mounting points, but because trucks were customized over the years and sleepers were sometimes modified after leaving the factory, some trimming, drilling, or adjustment during installation is common. We recommend reviewing the product description for fitment notes and reaching out to us if you have questions about how a specific part will fit your truck before you buy.