# 3 Upgrades To Get More MPG Out Of A 6.6 Duramax

> The mighty Duramax diesel engine has been around since 2001, with the 6. 6-liter being the largest. Available in the heavy-duty Chevrolet Silverado and GMC Sierra, the latest iteration of this powerplant offers 470…

- **Source:** [SlashGear](https://www.slashgear.com/1875751/6-6l-duramax-engine-mpg-upgrades/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6844871de6550b919c5d65d9)
- **Published:** 2025-06-07
- **Category:** Cars
- **Tags:** #chevrolet #duramax #upgrades #around #available #being #diesel #duty
- **Canonical:** http://localhost:4321/a/6844871de6550b919c5d65d9

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_GearOpen's distilled summary. The full original article is published at SlashGear (source link above); GearOpen does not republish the source's full text._