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Get your 2017+ Chevrolet Silverado and GMC Sierra 2500/3500 6.6L Duramax ready for tuning! Choose one of three options to upgrade your L5P E41 ECM for tuning: Purchase, Exchange, or Upgrade.
Shipping address for ECM Exchanges and Upgrades: Warranty Killer Performance (ATT: L5P ECM Service), 220 Aero Drive, Shreveport, LA 71107 USA
ECMs with broken “LOCKING” tabs or connectors WILL NOT be accepted for Upgrades and Exchanges.
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