Peterbilt 389 Glider Deck Plates & Air Line Boxes

Frequently Asked Questions About Peterbilt 389 Glider Deck Plates & Air Line Boxes

What are glider deck plates and air line boxes used for on a Peterbilt 389?

Glider deck plates cover the catwalk area behind the cab, providing a finished look and a durable walking surface, while air line boxes house and protect the air and electrical lines that run between the tractor and trailer connections. Together, these components clean up the back-of-cab area and give the truck a polished, custom appearance.

Will these deck plates and air line boxes fit my specific Peterbilt 389?

Fitment can vary depending on whether your truck is a standard production model or a glider kit build, as well as the wheelbase and chassis configuration. Before ordering, check the listed specifications and measurements for each part, and compare them to your truck's setup. If you're unsure, reach out to our team with your VIN or build details so we can help confirm compatibility.

What materials and finishes are available for these parts?

Most deck plates and air line boxes are offered in stainless steel, often with a polished or brushed finish to match other exterior accessories. Some options may also include diamond plate or textured patterns for added durability and slip resistance. Choose a finish that complements the rest of your truck's stainless or chrome package.

Are these parts a direct bolt-on installation, or is fabrication required?

Many deck plates and air line boxes are designed as direct bolt-on replacements using existing mounting points, but some installations may require minor drilling or fitment adjustments depending on your truck's configuration. We recommend reviewing the product description and any included instructions, and having a qualified technician handle installation if modifications are needed.

How do I maintain the finish on stainless steel deck plates and air line boxes?

Regular washing with mild soap and water will help prevent buildup of road grime, salt, and brake dust that can dull the finish over time. For polished stainless, using a dedicated metal polish periodically will help maintain shine and prevent surface staining. Avoid harsh abrasive pads, which can scratch the surface and diminish the finish.