Streamline Your LS/LT Swap: The Ultimate Guide to CPP Harnesses & Accessories

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LS & LT Engine Wiring Harnesses​

• Purpose-built harnesses designed for seamless engine swaps of LS and LT powerplants into classic cars and trucks.
• Coverage spans multiple engine generations:
  • Gen II (LT) – e.g., LT1/LT4
  • Gen III (LS) – 24x crank, early LS variants (LS1/LS2, etc.)
  • Gen IV (LS) – 58x crank sensors (LS3, LS7, etc.)
  • Gen V (LT1/L83/L86) – newer LT engines
• Includes:
  • Main engine harnesses
  • ECM/PCM wiring kits
  • Extensions (O₂, MAF, sensor adapters)
  • Dash connectors (tach, speedo, TCC, MIL, DLC diagnostic port)

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ECM & Controller Packages​

• Plug-and-play ECM kits pre‑tuned for classic swap applications:
  • Eliminates need for extensive aftermarket tuning
  • Configured for older vehicle electrical systems by disabling modern diagnostics

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🛠 Accessories & Adapters​

• Wide accessory catalog supporting swap installations:
  • O₂ sensor and MAF extensions, pigtails, adaptors
  • Coil relocation and drive-by-wire pedal kits
  • Brackets, mounts, and sensor adapters

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Key Benefits​

• “Plug‑&‑Play” simplicity – minimizes custom wiring hassles
• Exact fitment – from Gen II to Gen V, aiding compatibility
• Quality connectors – high-temp TXL wire, OEM-grade Delphi or GM connectors
• Modular design – enables piecing together exactly what you need (e.g. just harness + O₂ extensions)

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Typical Setup Example​

1. Choose the correct standalone engine harness for your engine’s crank sensor package (24x / 58x / LT).
2. Add vendor ECM/controller package suited to engine-gen and classic vehicle wiring.
3. Supplement with extensions or adapters for sensors like O₂, MAF, coil packs.
4. Include pedal and dash connectors if running drive-by-wire setups or retro-style gauge integration.

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Quick Reference Table​

Component Type	Function/Contents
Standalone Harness	Core wiring for cranking/firing + key sensors
ECM/Controller Kit	Preprogrammed PCM + main harness integration
Sensor Extensions	Add-ons: O₂, MAF, knock, coil relocation adapters
Pedal/Kickdown Kits	DBW pedals, throttle/cable adapters

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Bottom line: CPP’s LS & LT harness and accessory line is tailored for enthusiasts performing engine swaps into older vehicles. They offer generation-specific harness kits, plug-and-play ECMs, and necessary extensions to get your LS/LT engine running cleanly with minimal headaches.​

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