Hypertech 33003 Max Energy E-CON Power Programmer for 2006-2009 GM Duramax 6.6L LLY / HO LBZ / LMM Fuel tuning A and B; tow safe in all power levels up to maximum GCWR Reads and clears Diagnostic Trouble Codes (DTC's) Internet updateable Upgradeable to Max Energy programmer Features easy plug and play design