TIKSCIENCE LS Gen III ECM Bench Harness — Blue Delphi Connector, 12V Power & OBD2 for 1999–2007 LS ECMs

The TIKSCIENCE LS Gen 3 ECM Bench Harness is a plug-and-play programming and testing rig that powers and communicates with 1999–2007 GM Gen III (LS1/4.3/4.8/5.3/5.7/6.0/8.1L) ECMs via OBD2 for bench tuning, diagnostics, and flashing.

If you remove an ECM/PCM from a vehicle for tuning, repair, or bench testing, you need a reliable way to supply 12 volts and provide OBD2 communications without the car. This harness package includes a new Delphi/Aptiv BLUE connector, a full-size OBDII port, an automotive-grade 12V power supply, and robust 18‑gauge TXL wiring in high-temp nylon split loom so you can program or read the module safely using popular tuning tools.

How does this harness let me program an LS Gen III ECM off the vehicle?

The harness provides the correct pin-to-pin connections, fused 12V power, and an OBD2 interface so the ECM thinks it is installed in a car. It supports the Blue/Red and Blue/Green Gen III PCMs produced between 1999 and 2007 and works with standard OBDII tuning workflows.

• Supplies regulated 12V to the BLUE PCM connector and OBDII port
• Includes OBDII port compatible with EFI Live, HP Tuners, Tuner Cats, and other software
• Plug-and-play setup with tested ECM compatibility
• All-new Delphi/Aptiv components and 18 AWG TXL wiring for durability

Will it work with my tuning software and which PCMs are supported?

This bench harness is software-agnostic and communicates through the OBDII protocol, so it works with most commercial tuning suites that expect a standard OBD2 connection. It supports Gen III LS family modules (LS1, 4.3, 4.8, 5.3, 5.7, 6.0, 8.1 liters) produced between 1999–2007, including blue/red and blue/green style PCMs.

• Compatible with EFI Live, HP Tuners, Tuner Cats, and common OBDII tools
• Works with both blue/red and blue/green Gen III PCM variants
• Designed for 1999–2007 LS family ECM/PCMs
• Includes power, OBDII, and BLUE connector for full bench communication

What safety and durability features are built into this bench harness?

The harness uses automotive-rated materials and a new 12V power supply to minimize risk when powering an ECM outside the vehicle. The assembly is protected with high-temperature nylon split loom and tested on an ECM prior to shipping to ensure reliability during programming and diagnostics.

• High-temp nylon split loom protects wiring from heat and abrasion
• 18 gauge TXL wiring matches automotive standards for power and signal
• All-new Delphi/Aptiv connectors resist wear and intermittent contact
• Pre-shipped ECM tests verify harness functionality

Who is this for? This bench harness is aimed at professional tuners, performance shops, and experienced DIY enthusiasts who remove Gen III LS ECMs for flashing, calibration, or detailed diagnostics. If you routinely bench-program PCMs, validate custom tunes, or need a safe, repeatable way to communicate with LS1/Gen III computers outside a vehicle, the TIKSCIENCE harness supplies the wiring, power, and OBD2 interface required to integrate with mainstream tuning software and shop workflows.

Package contents include one Gen 3 LS bench-top harness with the BLUE side connector for the LS computer, a full-size OBDII port, and a 12V wall power adapter. Installation is plug-and-play—connect the harness to the PCM, plug in the power supply, and connect your tuning laptop or scan tool to the OBDII port to begin programming or reading data.