Diamond T ECM - 2004-2005 GM 6.6L LLY Duramax - ECM66LLY

Part # ECM66LLY

Ensure optimal performance and reliability for your 2004-2005 Chevy/GMC 6.6L Duramax LLY with the Diamond T ECM. This Engine Control Module is expertly overhauled to exceed OEM standards, providing superior quality and durability. Capable of managing a wide range of truck modifications, custom tunes, and upgrades, it’s the ideal solution for enthusiasts and professionals alike.

The ECM is a critical component for the LLY engine, and failures can be costly and disruptive. Diamond T addresses this common issue with a high-quality replacement that ensures compatibility and exceptional performance. Unlike other options, this ECM requires no core charge, simplifying the replacement process.

With free programming to the latest factory calibrations and a straightforward plug-and-play installation, the Diamond T ECM is designed to get your Duramax LLY back on the road quickly and reliably. Backed by a 1-year warranty, this replacement module delivers unmatched value and performance for your Chevy/GMC truck.

Fully rebuilt to surpass OEM quality standards
• Handles truck modifications, custom tunes, and performance upgrades
• 1-year warranty for peace of mind
• Designed for 2004-2005 Chevy/GMC 6.6L Duramax LLY engines
• No core charge required for hassle-free replacement
• Free programming with the latest calibrations
• Plug-and-play installation for convenience
• Essential replacement for reliable and optimized engine performance


Cross Reference Part Numbers:
• 12244189
• 15141667
• 15193862
• 15228726
• 15231599
• 15246462
• 15292913