Mack CV/GU Truck Air Springs & Level Valves

Frequently Asked Questions About Mack CV/GU Truck Air Springs & Level Valves

What do air springs and level valves actually do on my Mack CV/GU truck?

Air springs (also called air bags) support the weight of the truck's chassis and cab or suspension, absorbing road shock and helping maintain a smooth, stable ride. The level valve works alongside the air springs to automatically adjust air pressure as load conditions change, keeping the truck riding at the correct height regardless of how it's loaded. Together, these components help protect the frame, drivetrain, and cargo from excessive vibration and impact.

How do I know if my air spring or level valve needs to be replaced?

Common warning signs include a sagging or uneven ride height, a rough or bouncy ride, visible cracks or bulges in the air spring's rubber bellows, audible air leaks near the suspension or cab mounts, or the cab/chassis not returning to normal height after a load is removed. If you notice any of these symptoms, it's a good idea to inspect the air springs and level valve linkage for wear, damage, or leaks.

Will these air springs and level valves fit my specific Mack CV/GU model and year?

Mack CV and GU trucks were built across several years with different cab and chassis configurations, so exact fitment can vary. Always check the part number and specifications listed on the product page against your truck's existing components or VIN-based parts lookup before ordering. If you're unsure, our team can help confirm compatibility so you order the correct part the first time.

Can I install a new air spring or level valve myself, or should I have a professional do it?

Many experienced truck owners and shop technicians replace air springs and level valves themselves, as the job typically involves supporting the chassis or cab, removing the old component, and bolting in the replacement while reconnecting air lines and linkage. However, because this work involves the truck's air system and proper ride height adjustment, it's important to follow the correct torque specs and leveling procedure. If you're not comfortable working around a supported chassis or setting linkage adjustments, having a qualified technician handle the installation is recommended.

What's the difference between OEM and aftermarket air springs and level valves for these trucks?

OEM parts are built to match the original specifications used when your Mack CV/GU truck was manufactured, which can offer peace of mind on fit and performance. Aftermarket parts are manufactured to be compatible replacements and can often provide a more budget-friendly option without sacrificing durability. The right choice usually comes down to your budget, how the truck is used, and whether you have a preference for sticking with factory-spec components.