Get your 2017+ Chevrolet Silverado and GMC Sierra 2500/3500 6.6L Duramax ready for tuning by purchasing a brand-new E41 ECM from HP Tuners that's already upgraded for tuning and diagnostics.
HP Tuners L5P - Modified ECM Purchase
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.