2025 Freightliner Cascadia Bulb Size Guide

Quick reference

LED vs halogen upgrade considerations

When upgrading from halogen to LED bulbs on your 2025 Cascadia, there are a few important things to keep in mind. CANBUS errors are common, as the truck's computer may not recognize the lower power draw of LED bulbs. This can result in "bulb out" warnings on your dash. To avoid this, you may need to install CANBUS-compatible LED bulbs or use an anti-flicker harness.

Another consideration is the need for adapters. Some LED headlight bulbs may require a special adapter to fit properly in the housing. It's important to check this before making a purchase. Finally, be sure to choose high-quality LED bulbs from a reputable brand. Cheaper bulbs may not be as bright or last as long, and could even damage your truck's electrical system.

How to replace each bulb

• Headlights and Fog Lights: Access to the headlights and fog lights is fairly straightforward. Open the hood and locate the back of the headlight assembly. The bulbs can be removed by twisting the socket and pulling it out. Be careful not to touch the new bulb with your bare hands, as this can cause it to burn out prematurely.
• Turn Signals: The front turn signal bulbs are located in the headlight assembly, while the rear turn signal bulbs are in the tail light assembly. Access is similar to the headlights, but you may need to remove a few screws to get to the bulbs.
• Brake and Tail Lights: The brake and tail light bulbs are located in the same assembly. To access them, you'll need to remove the tail light lens from the outside of the truck. This is usually held in place by a few screws.
• Reverse and License Plate Lights: The reverse light bulbs are located in the tail light assembly, while the license plate light bulbs are in a separate housing above the license plate. Both are easy to access and replace.
• Side Marker and Dome/Map Lights: The side marker lights are located on the side of the cab, while the dome and map lights are in the overhead console. All of these bulbs can be accessed by removing a lens or cover.

Common lighting issues for this generation

The 2025 Cascadia is a new model, so there isn't a lot of data on common lighting issues yet. However, some potential problems to watch out for include premature bulb failure, flickering lights, and CANBUS errors. If you experience any of these issues, it's best to have your truck checked out by a qualified technician.

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