Peterbilt 386 Day Cab Conversion

Frequently Asked Questions About Peterbilt 386 Day Cab Conversion

What does a day cab conversion actually involve?

A day cab conversion is the process of removing the sleeper section from a Peterbilt 386 and replacing it with a shortened frame, back-of-cab panel, and fairing kit designed to give the truck a factory-style day cab appearance. This typically includes cutting and shortening the frame rails, relocating or shortening components like exhaust, battery boxes, and wiring, and installing a back panel that seals off the cab where the sleeper used to be.

Will a conversion kit match the factory look of my 386?

Quality conversion panels and fairings are molded to follow the original lines of the Peterbilt 386 cab, so a properly fitted kit should sit flush and match factory body contours closely. Fit can vary slightly depending on the age of the truck and any prior body modifications, so it is a good idea to compare panel dimensions to your specific cab before ordering.

Do these kits come pre-painted or do I need to paint them?

Most back panels and fairing components are sold in gelcoat or primer finish and will need to be painted to match your truck. This gives you the flexibility to color-match your specific paint code, but you should plan for paint and bodywork as a separate step in the conversion process.

Can I install a day cab conversion myself, or does it require a body shop?

While some experienced fabricators and DIY mechanics take on frame shortening and panel installation themselves, this job typically involves cutting the frame, rerouting wiring and air lines, and fabricating mounts for the new back panel. Because of the structural and electrical work involved, most customers have this done by a shop experienced in frame modifications and body fitment.

Will shortening the frame affect my truck's weight rating or resale value?

Removing the sleeper and shortening the frame reduces overall length and weight, which can be beneficial for maneuverability and payload in vocational or regional applications. However, frame modifications should be done according to the frame manufacturer's guidelines to maintain structural integrity, and buyers should be aware that a converted truck is viewed differently than a factory-built day cab when it comes time to resell.