Peterbilt 389 Glider Gauges & Switches

Frequently Asked Questions About Peterbilt 389 Glider Gauges & Switches

Will these gauges and switches fit my Peterbilt 389 glider kit without modification?

Most gauges and switches in this category are designed to match the factory dash layout and gauge cluster openings used in Peterbilt 389 gliders. However, glider kits can vary slightly depending on the build year and body shop that assembled them, so its a good idea to compare the mounting hole size, panel cutout dimensions, and wiring connector type before purchasing to confirm a proper fit.

Are these replacement parts OEM or aftermarket?

This category includes a mix of OEM-style replacement gauges and switches as well as quality aftermarket options. Each product listing specifies whether the part is OEM, OEM-equivalent, or aftermarket, so you can choose based on your preference for factory matching versus cost savings.

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

Basic hand tools such as a screwdriver and trim panel removal tool are typically all that's needed to access the dash and swap out a gauge or switch. Most units use factory plug-and-play connectors, but if your glider's wiring was custom-run, you may need basic electrical knowledge to confirm wire polarity and function before final installation.

How do I know which gauge or switch matches the one currently in my truck?

Check the face markings, numbering, and increments on your existing gauge, along with the physical size and connector style. Switches should be matched by function label and toggle or rocker style. If you're unsure, comparing part numbers or reaching out to our team with a photo of your current gauge or switch can help confirm an accurate match.

What should I do if my new gauge doesn't read accurately after installation?

First, verify the gauge is wired to the correct sending unit or signal source, since crossed wiring is a common cause of inaccurate readings. Also check that the ground connection is clean and secure. If the gauge still doesn't read correctly after confirming proper wiring, it may be defective and should be addressed through the manufacturer's warranty or our return process.