Sterling L-Series Deck Plate-Air Box

Frequently Asked Questions About Sterling L-Series Deck Plate-Air Box

What is the deck plate-air box on a Sterling L-Series truck?

The deck plate-air box is the component located behind the cab on the truck's frame deck that houses and protects the air lines and electrical lines running between the cab and the rest of the truck, including the trailer connections. It typically includes a mounting plate along with a box or cover to shield the fittings, glad hands, and wiring from road debris and weather.

Will this deck plate-air box fit my specific Sterling L-Series model and year?

Sterling L-Series trucks were built over several years with some variation in frame and cab configurations, so fitment can differ depending on the exact model and year. Check the listed specifications and part numbers on each product page against your truck's information, and if you are unsure, reach out to our parts team with your VIN or model details so we can confirm the correct match before you order.

What material and finish options are available for these deck plates and air boxes?

These parts are commonly available in steel or aluminum, with finish options such as raw, painted, or polished aluminum depending on the specific product. Steel versions are generally heavier duty and often painted or coated for corrosion resistance, while aluminum options offer a lighter weight and a cleaner appearance. Review each listing for the exact material and finish before purchasing.

What does installation typically involve?

Installation generally involves removing the old deck plate or air box assembly, transferring or reconnecting the air lines and electrical connections, and bolting the new plate or box into place using the existing mounting holes on the frame deck. Most units are designed to bolt on without major modification, but you should have basic hand tools on hand and be prepared to briefly disconnect air and electrical lines during the swap. If you are not comfortable working with air brake lines, we recommend having a qualified technician handle the installation.

Why should I replace a damaged or rusted deck plate-air box instead of just repairing it?

A cracked, rusted, or heavily worn deck plate-air box can expose air lines and wiring to moisture, road salt, and debris, which increases the risk of air leaks or electrical faults over time. Replacing the unit rather than patching it up gives you a clean mounting surface and ensures the air lines and connections are properly protected, which helps avoid more costly repairs or downtime down the road.