Used programmer took of 2003 Duramax diesel. Truck will not blow out black smoke but it did help mpg greatly.
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I took the rest of this from the website bought from.
The 21000 Truck Edition module fits the 6.6L LB7 Duramax engine in the 2001 thru 2004 GM trucks. The boys over at Agricultural Diesel Solutions blew you away with their state of the art ag modules for your tractors and combines. But wait till you get a load of the Truck Edition modules. They are designed for everyday use whether you are towing or just looking to save some money on fuel costs.
The Truck Edition module can increase your power up to 90hp over stock all while delivering fuel economy benefits of 3 to 4 mpg. They are dyno tested to a 20k load so we can ensure that you are towing safely. Adjustable four position switch lets you select between Stock, +30, +60, or +90 hp.
$200 call or text for any questions show contact info