Due to General Motors locking out the ECM on the 2011-2012 Duramax we are not able to custom tune the fuel maps with our Duramileage tuning.
One of the reasons for poor fuel economy on the new 2011/12 Duramax diesels is the injector flow rates are mis-matched. We work closely with a Bosch Technician who has developed a process to cure this issue. You can reach him by calling his personal cell phone at 1-208-512-7608. (he does not have voice mail so please be patient in trying to reach him)
WE DO ADVISE YOU TO BE CAREFUL INSTALLING OTHER MANUFACTURES PROGRAMMERS BECAUSE THEY WILL AFFECT YOUR WARRANTY! SINCE 2007 ALL FLASH PROGRAMMING TO THE ECM IS DETECTABLE.
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