March Tax Time Special: Additional 5% OFF All RCI Products! Contact for details.
Get your 2017+ Chevrolet Silverado and GMC Sierra 2500/3500 6.6L Duramax ready for tuning with HP Tuners E41 ECM Upgrade service. Upgrade your original E41 ECM for tuning and diagnostics via this send-in, one-time service. Simply send HP Tuners your original E41 ECM and we'll upgrade it for tuning and diagnostics.

This Part Fits:

Year Make Model Submodel
2021-2022 Chevrolet Silverado 2500 HD Custom
2017-2022 Chevrolet Silverado 2500 HD High Country
2017-2022 Chevrolet Silverado 2500 HD LT
2017-2022 Chevrolet Silverado 2500 HD LTZ
2017-2022 Chevrolet Silverado 2500 HD WT
2017-2022 Chevrolet Silverado 3500 HD High Country
2017-2022 Chevrolet Silverado 3500 HD LT
2017-2022 Chevrolet Silverado 3500 HD LTZ
2017-2022 Chevrolet Silverado 3500 HD WT
2020-2022 GMC Sierra 2500 HD AT4
2017-2021 GMC Sierra 2500 HD Base
2017-2022 GMC Sierra 2500 HD Denali
2022 GMC Sierra 2500 HD Pro
2017-2022 GMC Sierra 2500 HD SLE
2017-2022 GMC Sierra 2500 HD SLT
2020-2022 GMC Sierra 3500 HD AT4
2017-2021 GMC Sierra 3500 HD Base
2017-2022 GMC Sierra 3500 HD Denali
2022 GMC Sierra 3500 HD Pro
2017-2022 GMC Sierra 3500 HD SLE
2017-2022 GMC Sierra 3500 HD SLT
Translation missing: en.general.search.loading