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.

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.

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

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

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

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.