2001-2004 6.6L Duramax LB7 part #21000

Diesel Pro Modules
The 21000 Performance Module. its 6.6L GM Duramax trucks (LB7 engines) from 2001 thru 2004. This diesel performance module is designed for fuel economy improvement of up to 20% and up to 30% increase in hp. Adjustable with a four position switch you can adjust the power on the fly, Stock, +30 HP 60 HP, & +90 HP. The module doesn’t flash the ECM, instead it receives the data from the ECM, optimizes the signal to the engine improving the fuel efficiency and power. Plug-and-play connectivity means there’s no need to cut, splice or modify engine wiring.