Gen IV LS3 Standalone Swap Harness – 58x, Drive-By-Wire, 6L80E/6L90E Compatible

For 2006–2014 LS/Vortec Swaps | Built for Performance & Reliability

Application Fitment

This standalone harness is designed to work with the following Gen IV GM engines and vehicles:

• 2006–2007 Corvette 6.0L LS2

• 2008–2013 Corvette 6.2L LS3

• 2010–2014 Camaro SS 6.2L

• 2008–2009 Pontiac G8 GT 6.0L

• 2007 (New Body Style)–2014 GM Vortec Trucks with 4.8L, 5.3L, 6.0L, or 6.2L Engines

• These are swap harnesses and not direct replacement OEM harnesses.

⚠️ Note: 2014+ 6.0L Vortec applications originally using the E78 ECM will require conversion to an E38 ECM and an older-style throttle body for compatibility.

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Description

Upgrade your engine swap with confidence using our SPDZ1 Gen IV LS3 Standalone Harness—engineered for clean, reliable installations of 58x Gen IV LS engines with Drive-by-Wire throttle control and EV6 injectors, paired with a 6L80e or 6L90e transmission.

Whether you're running a Corvette LS3, Camaro SS, or a Vortec truck engine, this harness supports 4.8L to 6.2L configurations and is built to meet or exceed OEM reliability and performance standards.

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Why Choose SPDZ1?

• ✅ OEM-Tier TXL Wiring: Color-coded GM-standard TXL wire ensures heat resistance, durability, and easy troubleshooting

• ✅ Premium Connectors: Uses only OEM Aptiv, Kostal, Bosch, Molex, and Yazaki connectors

• ✅ CPA Locks: Connector Position Assurance (CPA) locks included for security and longevity

• ✅ Adjustable Firewall Grommet: Sliding Delphi grommet included for a professional firewall seal

• ✅ Long Reach Design: 5 feet from the rear passenger side of the intake for flexible PCM mounting

• ✅ Weatherproof OEM-Style Fuse Block: Complete with cover, labeling, and splash guards

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Pre-Wired Factory Connections (Included):

• Throttle Body (6-pin Drive-by-Wire)

• Oil Pressure Sensor

• Coolant Temperature Sensor

• Alternator/Generator

• All 8 EV6 Injector Connections

• Bank 1 & Bank 2 Coil Harnesses

• Knock Sensors (Bank 1 & 2)

• Camshaft Position Sensor

• Crankshaft Position Sensor

• Mass Air Flow Sensor (MAF)

• MAP Sensor

• Intake Air Temp (IAT – if Speed Density selected)

• Upstream O2 Sensors (Bank 1 & 2)

• 6L80e/6L90e Transmission Connector

• A/C Pressure Sensor

• DLC Port (OBD-II)

• Accelerator Pedal Position Sensor

• Single Battery Constant Power

• System Ground

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User-Connected Wiring Required:

• Fuel Pump Power Feed (Required)

• Switched Ignition Source (Required)

• Malfunction Indicator Light (CEL/MIL)

• Speedometer Signal

• Tachometer Signal

• TAP Shift (Optional for Auto Transmissions)

• Cooling Fan 1 Control (Low Speed or Single Fan)

• Cooling Fan 2 Control (High Speed or Dual Fan Systems)

• Brake Switch Input

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SPDZ1 Wiring Solutions are designed for performance builds where reliability, ease of installation, and OEM quality matter. Whether it's a weekend swap, full race build, or restomod, trust our harnesses to power your LS dreams.