LS Standalone Wiring Harness 4.8 5.3 6.0 Compatible with 1999-2006 GM Vortec Engines 4L60E with Adapter Transmissions Complete Wire Harness for Fuel Injection System DBC Engine Harness

Harness went in without an issue, was too long for my application, but that is a good thing honestly. It could swap into just about anything.Felt like good quality, no need to spend $800 for an equivalent harness. Started right up today without a single issue.$80 harness $20 junkyard ecu, $50 base tune, car was running right away.Only complaint actually is the fuel pump relay situation, it’s only half wired. The instructions cover that but, mine didn’t have the connectors. It would be nice if there was a better solution there, but not a big enough issue to take a star away. Will definitely continue to order this harness for my swaps.

I did the YouTube mods and it has worked great for me. Running a 01 6.0 in a mud truck great.

Have a 95 Chevy k1500 installed 2003 ls 5.3 last year. Ran fine but used original wiring harness. Had extra money decided to purchase the stand alone wiring harness to clean up the wires. First the injector connectors was wrong. The o2srnsors was wrong had female plugs on both ends on harness side an I noticed the female adapter checked original harness it was male connector so I cut them off an soldered onto new harness after that everything was in place fuel pump won’t start an end won’t start has very poor instructions an even worst tech support realizing I should of left harness along if not broke don’t fix it

Had to repin ecu pins on blue and red connectors and add extra wire in pin 75 red side connector and jump to pin 19 red side connector but other than moving the pins using youtubes help , harness performs good . Recommend buying if youre on a budget but you will have to repin. So far after 5 months I have no problems

Injector plugs are for LS one EV one injectors, not for Vortech truck injectors the connectors are very similar, but they will not plug-in. So if you’re using a Vortech 4.8 5.3 6.0 you will need EV 1 to Multek adapters. The last picture is the multek connector

Product was very well packaged and included all connectors for engine swap! Super easy install once you figure out routing.

Definitely a great price for a reasonable build budget, highly recommend.

This completely did NOT fit anything about the Vortec truck setup. The only plugs that were correct was the alternator & coolant temp sensor plugs. Literally EVERYTHING else was LS1 style plugs for a LS1 car style setup(Camaro). Waste of time and money for a truck harness. Would've been better off getting a stock truck harness and stripping it all down.