GM E41 ECM Services (L5P) - Upgrade Only Model_C7500 Everything you need to tune

Everything you need to tune your E66 ECM vehicle with HP Tuners:

so it’s plug-and-play—no need for the GM factory tool

this kit includes four (4) ECU connectors and several section of wiring (15-ft

and great-looking in any engine bay

while the fuel level sender mount ensures factory fuel gauge functionality

GM E41 ECM Services (L5P) - Upgrade Only Model_C7500 Everything you need to tuneGet your 2017+ Chevrolet Silverado and GMC Sierra 2500 3500 6. 6L Duramax ready for tuning! Choose one of two options to upgrade your L5P E41 ECM for tuning: Purchaseor Upgrade. Shipping address for send in E41 ECM service: HP Tuners (ATT: L5P ECM Service), 700 Eastwood Ln, Buffalo Grove, IL 60089 ECMs with broken LOCKING tabs or connectors WILL NOT be accepted for upgrades. Tune your GM L5P Truck with HP Tuners The L5P ECM Service from HP Tuners