Gauges & Switches

Frequently Asked Questions About Gauges & Switches

Will these gauges and switches fit my truck's make and model?

Many gauges and switches are designed to fit specific dash panel cutouts, mounting styles, or electrical systems used by particular truck brands like Peterbilt, Kenworth, or Freightliner. Before purchasing, check the product listing for compatible makes, models, and years, and compare the physical dimensions and connector type to your existing setup. If you're unsure, our customer service team can help confirm fitment before you buy.

What is the difference between mechanical and electrical (air vs. electric) gauges?

Mechanical gauges typically read pressure directly through an air or fluid line running to the gauge, while electrical gauges rely on a sensor and wiring to send a signal to the gauge face. Electrical setups are often easier to route through a dash, while mechanical gauges can be more direct but require careful line installation to avoid leaks. Check your truck's existing sending units and wiring to determine which type will work with your system.

Do I need any special tools or wiring knowledge to install a new gauge or switch?

Basic installation typically requires simple hand tools like screwdrivers, wire strippers, and crimp connectors, along with a way to safely access your dash wiring and fuse panel. If you're replacing a gauge in an existing hole, the job is usually straightforward, but adding a new gauge or switch may require drilling a mounting hole and running new wiring. If you're not comfortable working with electrical connections, having a qualified technician handle the install is a good option.

What finish and style options are available for gauges and switches?

Gauges and switches on our site come in a variety of styles, including chrome, black bezel, and billet aluminum finishes, along with different face designs and backlighting colors to match your interior. Switches are also available in various toggle, rocker, and push-button styles. Matching the finish to your existing dash hardware will give the cleanest, most factory-like appearance.

How do I know if a gauge or switch is a direct replacement or an aftermarket upgrade?

Direct replacement parts are built to match the original equipment specifications, including mounting size, connector type, and read-out range, so they should install without modification. Aftermarket upgrades may offer different styling, additional features, or a different read-out method, which can require extra wiring or a different mounting approach. Product descriptions will typically note whether an item is OEM-style or an aftermarket upgrade, so review those details closely before ordering.