2017-2023 Duramax L5D 6.6L

Engineered for the ultimate commercial-grade workload. While sharing its robust foundation with the legendary L5P, the 6.6L L5D Duramax is specifically optimized for medium-duty Chevy Silverado 4500HD, 5500HD, and 6500HD trucks. Tuned for maximum mechanical longevity, constant thermal efficiency, and relentless low-end torque, this platform is built to handle the heaviest payloads and the most demanding fleet environments day in and day out.

Whether you are performing fleet maintenance, optimizing cooling and airflow, or upgrading chassis components for maximum job-site reliability, find everything you need here.

2017-2023 Duramax L5D 6.6L