The new DD15® Gen 5 engine builds upon Detroit’s industry-leading heavy-duty engine legacy and proven technologies to bring efficiency and performance to the next level. The DD15® Gen 5 engine offers the best of the best in cutting-edge diesel engine technology and engineering, resulting in the most reliable diesel engine for your semi truck.
The DD15® Gen 5 has been significantly redesigned to offer new ratings, an all-new aftertreatment system, and numerous innovations to further increase efficiency, durability and performance. We’ve engineered key improvements to the design of the DD15®, including increased downspeeding, better combustion and new swirl piston design -- culminating in a fuel efficiency improvement of up to three percent. All while meeting GHG 2021 standards.Brochures and Videos Maintenance Intervals and Warranties
The DD15® Gen 5 engine has been significantly redesigned with innovative new features, building on the legacy of the most popular Class 8 diesel engine in North America.More Specs
The best 6-cylinder diesel engine available in the heavy-duty commercial vehicle market just got even better. The DD15® Gen 5 builds upon proven Detroit® technology to offer industry-leading efficiency, performance and durability. Key design features include:
Designed for a range of on-highway and vocational applications.
If maintenance issues come up while on the road, you can count on Detroit Connect Virtual Technician®. With Virtual Technician, you are notified within minutes when your vehicles experience a fault event, the severity of the fault and when, where and how to best fix the issue causing the fault so you can make informed service decisions.
With the longest service intervals in its class and an easily serviceable design, the Detroit® DD15® Gen 5 lowers your cost of ownership by decreasing your time in the shop. With oil and fuel filters positioned above the frame rails, you'll be back in the driver's seat fast.
Sharing common service operations and parts with the DD13® and DD16® ensures that trained technicians are ready to serve you and your DD15® Gen 5 at any of our 800+ authorized Detroit® locations across the highways and back roads of North America.
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All DDCSN content has been migrated to our DTNAConnect web portal. All information previously on the DDCSN is now on DTNAConnect. We have created a quick reference guide to help you locate the migrated content on DTNAConnect. Existing DDCSN login credentials will also work with DTNAConnect. Please work with your security administrators for login or content issues. If you do encounter any technical issues, please contact the Software Support Center at 855-639-8680 or email@example.comDTNA CONNECT PORTAL LOGIN