The Duramax L5P is already a powerhouse, but smart upgrades and proper tuning can take it to the next level without sacrificing reliability. From advanced monitoring tools to first-to-market tuning ...

HP Tuners has launched custom tuning and diagnostics support for the 2026 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks with the 6.6L L5P Duramax and E42 ECM. The release offers full read, ...

Known under the VIN code Y, the L5P Duramax is the latest evolution of the 6.6-liter turbo diesel that powers the Silverado HD and Sierra HD. Introduced for the 2017 model year and mated exclusively ...

Introduced for the 2017 model year, the L5P is the Duramax V8 turbo diesel General Motors utilizes in heavy-duty pickups like the Silverado HD. Manufactured in the United States, the 6.6-liter turbo ...

We recently discussed diesel programmers and the role they play in our pursuit of higher performance. Although the OBD-II-driven devices have many different functions, changing the parameters in a ...