Intended for early (Gen III) LS Engines, this main harness has several unique features that make it perfect for routing on cable-driven applications. Highlights include:

• For Drive-By- Cable (DBC) Throttle Body Application
• Cam Sensor Located on Rear of Engine
• Dual Bosch 4.9 LSU Sensor Connectors
• MAP Sensor Can Be Routed to Front or Rear of Engine
• 20 Pin Input/Output Expansion Connector (For Use with Sub Harnesses Listed Below)
• Knock Sensors Routed to Engine Valley
• EV6 Injector Connectors (EV6 to EV1 Adapters Sold Separately)
• Pre-Terminated CAN Connectors
• Can Be Paired w/ Optional GM Transmission Harness (Part of The Above Uses for Expansion Connector)

Intended for late (Gen IV) LS Engines, this main harness has several unique features that make it perfect for routing on drive-by-wire applications. Highlights include:

• For Drive-By-Wire (DBW) Throttle Body Application
• Cam Sensor Located on Front of Engine
• Dual Bosch 4.9 LSU Sensor Connectors
• MAP Sensor can be routed to front or rear of engine.
• Knock Sensors on the side of the engine block.
• 20 Pin Input/Output Expansion Connector (For Use with Sub Harnesses Listed Below)
• EV6 Injector Connectors (EV6 to EV1 Adapters Sold Separately)
• Pre-Terminated CAN Connectors
• Can Be Paired w/ Optional GM Transmission Harness (Part of The Above Uses for Expansion Connector)

Intended for customers who want a completely custom harness, this kit includes four (4) ECU connectors and several section of wiring (15-ft. length). Highlights include:

• Four AMP ECU Connectors w/ Included Cavity Plugs
• Wiring – Color Coded 15-ft. Lengths
• Instructions w/ Connector Diagrams (Written for Experienced Users)

NOTE: Tech Support will be limited on Flying-Lead Harness Applications, it is the customer’s responsibility to ensure that best wiring practices are followed. Purchases are sold as-is. Connector diagram/instructions are written for users with wiring experience.

This harness provides a single harness for GM 4L60E and 4L80E Transmissions. No wiring changes or pin relocation required. Easily upgrade to a four-speed automatic transmission with this plug & play solution.

This harness provides a flying lead solution to customers who want to add additional I/O to their install. Easily wire-in extra sensors, cooling fans, electric pumps, and more.

Need adapters for a special application? Visit our partner, EFI Conversions,  for additional products that support CORE ECU.

Need more technical details? Find all the resources you need, including setup guides, wiring diagrams, and installation manuals.

• CORE ECU Installation Guide
• CORE ECU Parameter Guide
• VCM Live Software Download
• VCM Live Help Documentation

Coming soon!

CORE ECU is intended for use in exempt vehicles such as pre-emissions motor vehicles and documented competition vehicles that are exclusively for track use and not driven on public roads. HP Tuners does not condone the misuse of its products. All users are required to register their CORE ECU and identify the vehicle application before installation and use. Misuse of the CORE ECU will void the warranty.