Frequently Asked Questions About Peterbilt 567/579 Cab Lights

Will these cab lights fit my specific Peterbilt 567 or 579 model year?

Most aftermarket cab lights for Peterbilt 567/579 models are designed to fit trucks from 2013 to present. However, there are slight variations between model years, particularly in mounting hole patterns and wiring harness connectors. For 2013-2017 models, you'll typically need lights with a 5-bolt mounting pattern, while 2018 and newer models often use a 7-bolt pattern. Always verify your truck's specific mounting configuration before ordering, as some mid-year production changes can affect compatibility.

What's the difference between LED and incandescent cab lights, and which should I choose?

LED cab lights offer several advantages over incandescent options: they last 50,000+ hours compared to 2,000-5,000 hours for incandescent bulbs, draw 80% less power, and provide brighter, more consistent illumination. LEDs also generate less heat, reducing lens discoloration and housing damage. While LED lights cost more upfront (typically $150-300 per set vs. $50-100 for incandescent), they eliminate frequent bulb replacements and reduce electrical system strain. Most professional drivers prefer LEDs for their reliability and long-term cost savings.

How difficult is the installation process, and what tools do I need?

Installing cab lights typically takes 2-4 hours for someone with basic mechanical skills. You'll need a drill with metal bits (if adding new lights), wire strippers, electrical connectors, a multimeter, and basic hand tools. The main challenges include: properly sealing mounting holes to prevent leaks (use quality silicone sealant), routing wiring through the cab headliner without damaging interior panels, and connecting to the truck's electrical system correctly. Many drivers recommend having a second person help with alignment and testing. Professional installation typically costs $200-400 if you prefer to have it done at a shop.

What styles and lens colors are DOT compliant for commercial use?

DOT regulations require specific lens colors and positions for cab marker lights. The standard configuration includes five amber lights across the front roof line, with the center three lights facing forward and the outer two at 45-degree angles. Clear lenses with amber LEDs or amber lenses are both DOT compliant. Popular styles include the classic round "watermelon" lights, rectangular designs, and modern aerodynamic profiles. Chrome, black powder-coated, and polished stainless steel bezels are available. Avoid non-amber colors for the required marker positions, as these can result in inspection failures and fines.

How do I prevent water leaks and corrosion around cab light installations?

Water intrusion is the most common issue with cab lights. To prevent leaks: use a high-quality butyl tape or silicone sealant rated for automotive use around all mounting points, ensure mounting surfaces are clean and free of rust before installation, and apply dielectric grease to all electrical connections. Check and reseal lights annually, especially before winter. For corrosion prevention, choose lights with stainless steel hardware and sealed housings. If drilling new holes, treat exposed metal with rust preventive primer before mounting. Regular inspection of seals and gaskets can catch problems before they cause cab damage.