Sterling A-Series Deck Plate-Air Box

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

What is the deck plate-air box used for on a Sterling A-Series truck?

The deck plate-air box is the component located behind the cab, typically on the frame rail area, that houses air line and electrical line connections while also serving as a step or transition plate between the cab and the frame or trailer connection area. It provides a mounting point for glad hands, air lines, and electrical cables while protecting these connections from road debris and weather.

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

Sterling A-Series trucks were produced over several model years with some variation in frame and mounting configurations. Before ordering, check the listed part number and compare the mounting hole pattern and dimensions against your existing unit or your truck's service documentation. If you are unsure, contact our parts team with your VIN or model year so we can confirm fitment before you purchase.

What material are these deck plates made from, and how do they hold up over time?

Most deck plate-air box units are made from steel or aluminum, depending on the specific part and manufacturer. Steel versions offer strength and durability but can be prone to rust if the finish is compromised, while aluminum versions resist corrosion better but may be more susceptible to denting. Check the product listing for the specific material and any protective coating or finish applied, such as paint or a raw finish that may require coating after installation.

How difficult is it to install a replacement deck plate-air box?

Installation typically involves disconnecting the air lines and electrical connections, removing the mounting bolts that secure the old plate to the frame, and transferring or replacing the glad hands and fittings onto the new unit. Most installers with basic mechanical tools and experience working on truck air and electrical systems can complete this job, though it is important to properly reseal and torque all air line fittings to prevent leaks after installation.

Do I need to transfer parts like glad hands, electrical sockets, or brackets from my old unit?

In most cases, yes. Deck plate-air box replacements are often sold as the plate or box structure itself, without the glad hands, electrical sockets, or associated hardware already installed. Check the product description carefully to see what is included, and plan to reuse your existing hardware if it is still in good condition, or order those components separately if they are worn or damaged.