: Often called the "holy grail" of modern Rams. It uses a robust common-rail fuel system but lacks the complex emissions hardware found in later 6.7L models.
Based on industry data and long-term owner reviews, these models are the top recommendations for used buyers in 2026: best used diesel truck to buy
: Ranked as the most reliable modern light-duty diesel, offering impressive fuel economy (up to 33 mpg highway) and smooth operation for daily driving. Top 10 Most Reliable Diesel Trucks in North America : Often called the "holy grail" of modern Rams
The best used diesel trucks offer a balance of mechanical simplicity, legendary engine durability, and strong resale value. For those seeking maximum reliability, models with the , 5.9L Cummins , or 6.6L LBZ Duramax engines are widely considered the gold standard. Top 5 Most Reliable Used Diesel Trucks Top 10 Most Reliable Diesel Trucks in North
: Often called the "holy grail" of modern Rams. It uses a robust common-rail fuel system but lacks the complex emissions hardware found in later 6.7L models.
Based on industry data and long-term owner reviews, these models are the top recommendations for used buyers in 2026:
: Ranked as the most reliable modern light-duty diesel, offering impressive fuel economy (up to 33 mpg highway) and smooth operation for daily driving. Top 10 Most Reliable Diesel Trucks in North America
The best used diesel trucks offer a balance of mechanical simplicity, legendary engine durability, and strong resale value. For those seeking maximum reliability, models with the , 5.9L Cummins , or 6.6L LBZ Duramax engines are widely considered the gold standard. Top 5 Most Reliable Used Diesel Trucks