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Howell LT/EcoTec3 Conversion Harnesses and Accessories Now Available for GM Direct Injection Swaps

Howell LT Harness
Howell LT/EcoTec3 Harness – Available for LT1, LT4, L83, L86, LV3 V6

Marine City, MI, (April 11, 2019) – Howell EFI, long been known as a leader in EFI conversions since the late 1980’s beginning with GM TPI conversions, GM TBI conversions for Jeeps, and 90’s LT1 conversions now offers LT/EcoTec 3 conversion harnesses and accessories for GM direct injection swaps.

Over the past two decades Howell added the manufacture of conversion wiring harnesses and accessories for the ultra-popular LS/Vortec engine family. For the 2014 model year GM launched the direct injected LT1 Corvette engine, as well as the companion EcoTec3 engine powered GM pickup truck. As these LT/EcoTec3 vehicles and engines began to proliferate the scene and the scrapyards, Howell EFI began developing harnesses and parts for swapping the LT/EcoTec3 family of engines into other vehicles.

Howell now offers LT1/LT4 swap harnesses for 2014+ Camaro and Corvette direct injection and for direct injection for trucks with EcoTec3 L83, L86, and 4.3L V6 LV3-C truck engines. With Howell’s plug and play harnesses it is possible to transplant these powerful LT/EcoTec3 engines for Street Rod, Pro-Touring, Off-Road, Sand Rails, Street Machines and more.

The LT/EcoTec3 harnesses are made to customer specifications and include a fuse block and GM diagnostic connector for diagnosis and service at any repair facility utilizing the common OBD II port, in addition to a check engine light, electric fan control, and a complete stand-alone design to control engine functions. All Howell harnesses are Made in the USA and sold with a Lifetime Guarantee. Installation requires just three points of power at the battery, ignition, and fuel pump making these harnesses truly plug-and-play. For more information, watch this video.

For more information about LT1 harness options and photos for download, visit here: https://howellefi.com/product-category/general-motors/gm-lt1-lt4-products-2014/

For more information about Howell LT4 harness options and photos to download, visit here: https://howellefi.com/?s=LT4+Harness&post_type=product

For more information about Howell EcoTec3 harness option and photos to download, visit here: https://howellefi.com/?s=EcoTec3+harness&post_type=product

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LT1/LT4/Ecotec3 Gen V Swap Harnesses Now Available!

LT1

Howell EFI is pleased to introduce their new 2016 LT1 Camaro, 2014 – 2016 LT1 Corvette, and 2015 – 2016 LT4 Corvette harnesses, as well as its Ecotec3 truck versions for the 2014 – 2016 4.3L, 5.3L and 6.2L GM Gen V engines.  For ease of installation, relays are included, wires are clearly labeled and terminated, and one ground serves the entire system.  Harnesses also include 6L80/6L90 transmission functionality making the installation of these engines and transmissions as easy as possible.

Each new harness also features its own fuse block and a GM diagnostic connector. This allows customers to have their vehicles easily diagnosed and serviced at any repair facility utilizing the common OBD II port. Installation requires just three points of power at the battery, ignition, and fuel pump making these harnesses truly plug-and-play.  Harnesses are prepared to customer specifications, not a one size fits all approach, and each incorporates a rugged nylon or OEM style plastic covering and glued shrink tube.

Howell EFI provides more vehicle coverage for these engines families at better prices than any other harness maker in the industry. With the ability to put an LT1, LT4, or Ecotec3 engine into basically anything you want, these new engines are sure to become very popular swap options. Each harness is proudly made in the USA with a Lifetime Guarantee.

Look to Howell EFI to make it happen with ease.

Application List

2014-2016 LT1 Corvette Harness Designs

  • #HY625846 – Manual Trans. – $900.00
  • #HY625846T – 6L80/90 Trans. – $1,000.00

ECM’s (Reprogrammed)

  • #HY625846E – $450.00 without ECM core trade-in
  • #HY625846EC – $275.00 with ECM core trade-in

2016 LT1 Camaro Harness Designs

  • #HF625846- Manual Trans. – $900.00
  • #HF625846T – 6L80/90 Trans. – $1,000.00

ECM’s (Reprogrammed)

  • #HF625846E – $450.00 without ECM core trade-in
  • #HF625846EC – $275.00 with ECM core trade-in

2015-2016 LT4 Corvette Harness Designs 6.2L Supercharged

  • #HY625846S – Manual Trans. – $900.00
  • #HY625846ST – 6L80/90 Trans. – $1,000.00

ECM’s (Reprogrammed)

  • #HY625846SE – $450.00 without ECM core trade-in
  • #HY625846SEC – $275.00 with ECM core trade-in

2014-2016 4.3L LV3-C-Truck Harness Design

  • #HVL435846 – Manual Trans. – $800.00
  • #HVL435846T – 6L80/90 Trans. – $900.00

ECM’s Reprogrammed

  • #HVL435846E – $450.00 without ECM core trade-in
  • #HVL435846EC – $275.00 with ECM core trade-in

2014-2016 5.3L L83-C-Truck Harness Design

  • #HVL535846 – Manual Trans. – $800.00
  • #HVL535846T – 6L80/90 Trans. – $900.00

ECM’s Reprogrammed

  • #HVL535846E – $450.00 without ECM core trade-in
  • #HVL535846EC – $275.00 with ECM core trade-in

2014-2016 6.2L L86 C-Truck Harness Designs

  • #HVL625846 – Manual Trans. – $800.00
  • #HVL625846T – 6L80/90 Trans. – $900.00

ECM’s Reprogrammed

  • #HVL625846E – $450.00 without ECM core trade-in
  • #HVL625846EC – $275.00 with ECM core trade-in

ADD $100.00 to harnesses requiring emission connections

ABOUT HOWELL EFI

At Howell EFI, we choose to sell only the best quality components and all are covered by a money back guarantee.  For additional information visit www.howellefi.com or call 810-765-5100.  Howell EFI is located at 6201 Industrial Way, Marine City, MI  48039

To learn more or to order your conversion kit or harness contact Howell EFI at www.howellefi.com or call (810) 765-5100.

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Howell EFI: Announces Ecotec3 4.3 L V6 Direct Injection Harnesses Now Available

Howell EFI announces availability of 2014+ EcoTec3 4.3L V6 LV3-C truck wiring harnesses, allowing for transplant into an unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street Machines and more. For ease of installation, relays are included, wires are clearly labeled and terminated, and one ground serves the entire system. Harnesses also include 6L80/6L90 transmission functionality making the installation of these engines and transmissions as easy as possible.

Each new harness also features its own fuse block and a GM diagnostic connector. This allows customers to have their vehicles easily diagnosed and serviced at any repair facility utilizing the common OBD II port. Installation requires just three points of power at the battery, ignition, and fuel pump making these harnesses truly plug-and-play.  Harnesses are prepared to customer specifications, not a one size fits all approach, and each incorporates a rugged nylon or OEM style plastic covering and glued shrink tube. ECM/TCM reprogramming needed for the swap is also available. Each harness is proudly made in the USA with a Lifetime Guarantee.

According to GM, the 4.3L EcoTec3 V-6 has one purpose – providing budget-conscious customers a great standard engine. It’s large 4.3L displacement provides class-leading torque (305 lb-ft) and available towing (7,600 lbs.) for a standard V-6, while its aluminum cylinder heads and block saves weight. Its ability to operate on four cylinders under lighter loads helps improve fuel efficiency. Look to Howell EFI to make a transplant happen with ease.

Part #HVL435846T –  $900. Add $100 to harnesses requiring emissions connections.

Click here to view our Ecotec3 4.3 L V6 Direct Injection Harnesses.

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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 www.howellefi.com or call (810) 765-5100.

#HVL435846 2014+ EcoTec3 4.3L V6 LV3-C Truck Harness (Manual Transmission)

#HVL435846 2014+ EcoTec3 4.3L V6 LV3-C Truck Harness (Manual Transmission)

Harness part #HVL435846 allows transplant of an EcoTec3 4.3L V6 engine into a unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines etc.

Harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, a complete stand-alone design to control engine functions.

ADD $100 to harnesses requiring emissions connections

#HVL435846T 2014+ EcoTec3 4.3L V6 LV3-C truck wiring harness (6L80/90 transmission)

#HVL435846T 2014+ EcoTec3 4.3L V6 LV3-C truck wiring harness (6L80/90 transmission)

Harness part #HVL435846T allows transplant of an EcoTec3 4.3L V6 engine into a unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines etc.

Harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, a complete stand-alone design to control engine functions.

ADD $100 to harnesses requiring emissions connections

#HVL535846 2014+ EcoTec3 5.3L V8 L83-C Truck Wiring Harness (Manual Transmission)

#HVL535846 2014+ EcoTec3 5.3L V8  L83-C Truck Wiring Harness (Manual Transmission)

Harness part #HVL535846 allows transplant of an EcoTec3 5.3L V8 engine into a unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines etc.

Harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, a complete stand-alone design to control engine functions.

ADD $100 to harnesses requiring emissions connections

#HVL535846T 2014+ EcoTec3 5.3L V8 L83-C Truck Wiring Harness (6L80/90 Trans)

#HVL535846T 2014+ EcoTec3 5.3L V8 L83-C Truck Wiring Harness (6L80/90 Trans)

Harness part #HVL535846T allows transplant of an EcoTec3 5.3L V8 engine into a unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines etc.

Harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, a complete stand-alone design to control engine functions.

ADD $100 to harnesses requiring emissions connections

#HVL625846 2014+ EcoTec3 6.2L V8 L86-C Truck Wiring Harness (Manual Transmission)

#HVL625846 2014+ EcoTec3 6.2L V8 L86-C Truck Wiring Harness (Manual Transmission)

Harness part #HVL625846 allows transplant of an EcoTec3 6.2L V8 engine into a unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines etc.

Harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, a complete stand-alone design to control engine functions.
ADD $100 to harnesses requiring emission connections

#HVL625846T 2014+ EcoTec3 6.2L V8 Truck Wiring Harness (6L80/90 Transmission

#HVL625846T 2014+ EcoTec3 6.2L V8 Truck Wiring Harness (6L80/90 Transmission

Harness part #HVL625846T allows transplant of an EcoTec3 6.2L V8 engine into a unlimited number of applications from Street Rod, Pro-Touring, Off-Road, Sandrails, Street machines etc.

Harnesses are made to your specifications and have fuse block, check engine light, diagnostic connector, electric fan control, a complete stand-alone design to control engine functions.
ADD $100 to harnesses requiring emission connections