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Howell EFI Announces 6.2/5.3/4.3 Ecotec3 Truck Harness Kits

Howell EFI’s new  Ecotec3 Truck Harness Kits allow the transplant of an EcoTec3 4.3L V6 engine, 5.3L V8 engine, and EcoTec3 6.2L V8 engine from 2014 + GM trucks and SUV’s into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines and more.

Howell EFI’s OEM quality harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, and a complete stand-alone design to control engine functions. Harnesses requiring emissions connections are also available upon request.

  • 6.2L V8 engine Kit Harness part #HVL625846T
  • 5.3L V8 engine Kit Harness part #HVL535846T
  • 4.3L V6 engine Kit Harness part #HVL435846

Click here to view our full lineup of GM EcoTec3 conversion products.

To learn more or to order your harness, contact Howell EFI at or call (810) 765-5100.