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03-07 LS VORTEC STANDALONE WIRING HARNESS DRIVE BY WIRE W/4L60E 4.8 5.3 6.0 EV6
Take the wiring headaches out of your LS swap and get your build running the right way.
When you’re putting a 2003–2007 LS Vortec drivetrain into an older muscle car, street rod, or non-emissions-controlled project, the last thing you need is wiring confusion slowing the build down. The HPI 03–07 LS Vortec Standalone Drive-By-Wire Wiring Harness is built to simplify your swap with a plug-and-play setup designed for 4.8, 5.3, and 6.0 truck engines using drive-by-wire and 4L60E transmissions.
BUILT FOR LS SWAPS
This harness is designed for 2003–2007 Chevrolet, GMC, Cadillac, and Hummer truck engines and is intended for retrofit use in older vehicles and newer non-emissions-controlled builds. It allows use of the factory Vortec intake manifold and supports Multec injectors, with optional EV6 plug-and-play adapter connectors available by request in the buyer notes.
PLUG-AND-PLAY SIMPLICITY
The harness is described as a complete engine and transmission harness with four-wire hookup requirements, using switched power, constant power, and ground connections. It also includes the needed dash connections for speedometer, tachometer, park neutral, TCC, malfunction indicator, and a DLC port, helping make your swap cleaner and easier to finish.
BUILT TO HANDLE REAL-WORLD SWAP DEMANDS
HPI states these harnesses are professionally constructed with brand new GM Delphi connectors and TXL high-temperature wire to GM specifications. The harness also features a sliding grommet seal for a professional, leak-resistant installation and includes 36 inches of added length for easier PCM mounting under the dash.
MADE FOR PERFORMANCE AND DURABILITY
From reinforced ring terminals to factory CPA locks, 1200-degree fiberglass braid on heat-exposed circuits, and upgraded 60-amp relays, this harness is built for enthusiasts who want more than a bare-minimum swap solution. Every harness is also described as quality inspected before shipping and handmade in the U.S.A.
WHY HPI
At HPI, swap parts should do more than just connect. They should fit right, install clean, and hold up under real performance use. This harness is built for builders who want a professional-looking LS swap without cutting corners.
Features:
- Designed for 2003–2007 LS Vortec drive-by-wire swaps
- Fits 4.8L, 5.3L, and 6.0L truck engine applications
- Compatible with 4L60E transmissions
- Complete engine and transmission harness
- Plug-and-play style standalone swap harness
- Supports factory Vortec intake manifold
- Supports Multec injectors
- Optional EV6 plug-and-play injector adapters available by request
- 36 inches of added length for under-dash PCM mounting
- Sliding grommet seal for cleaner installation
- Built with brand new GM Delphi connectors
- TXL high-temperature wire to GM specifications
- Upgraded 60-amp relays
- 1200-degree fiberglass braid on heat-exposed circuits
- Reinforced ring terminals
- Factory CPA locks
- Dash connections included
- Instruction manual included
- Handmade in the U.S.A.
Fitment:
- 2003–2007 Chevrolet / GMC / Cadillac / Hummer truck LS Vortec engines
- 4.8L / 5.3L / 6.0L
- Drive-by-wire applications only
- 4L60E or 4L80E transmission setups
- Older muscle cars, street rods, and newer non-emissions-controlled vehicles
What’s Included:
- Complete engine and transmission harness
- Install instruction manual
- Needed dash connections including speedometer, tachometer, park neutral, TCC, malfunction indicator, and DLC port
Price: $239.00
Get your LS swap wired with a harness built to save time, clean up the install, and keep your project moving forward with confidence.
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⚠️ WARNING (California Proposition 65):This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.For more information, please visit www.P65Warnings.ca.gov.
