Gen 3 LS ECM Programming Bench Harness With Power Supply For GM Chevy 1999-2007 Vehicles OBD2 Port Tune Testing Tool 18 Gauge Wiring 12 Volt Bench Reader Diagnostic Module
✔️ 12V powered bench harness for Gen III LS ECM tuning via OBDII
Designed for Gen III LS ECMs (LS1, 4.8, 5.3, 6.0) used in 1999 to 2007 GM and Chevy vehicles, this bench harness powers the ECM and provides OBDII communication for tuning and testing outside the vehicle. It plugs into a standard wall outlet and includes an 18-gauge TXL wiring bundle, the 12V power supply, and a blue LS computer connector with Delphi Aptiv parts for long life. This listing is a single set ready for immediate use.
✅ 12V power supply included for bench testing
✅ OBDII port communication for Gen III LS ECUs via tuning software
✅ Delphi/Aptiv wiring, 18 gauge TXL, and high-temperature nylon loom
✅ Works with EFI Live, HP Tuners, Tuner Cats and other software
💡 What is an ECM bench harness used for in GM LS tuning?
It lets you program Gen III ECUs on a bench, using OBDII communication and a 12V power supply, without removing the ECU from the vehicle.
- Handy for tuning fuel and ignition maps on LS1/4.8/5.3/6.0 engines
- Supports popular tuning software via OBDII interface
- Includes 12V power supply and Delphi/Aptiv wiring for durability
- Enables fault reading and data logging for quick diagnostics