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