LS Swap Standalone Harness with 4L60E Transmission, Engine Wiring Harness Compatible with 1997-2006 GM DBC LS1 4.8 5.3 6.0 Vortec Engines Drive by Cable 4L60E

Had to cut and splice the connectors with the 5.3 fuel injector plugs but it worked

Get what you pay for. A lot of the plug ends very cheap had to do some wiring for 02 sensors to read properly at PCM connection

This harness is Trash don’t waste your time ! You get what you pay for ! I tried it out connected everything well and the pcm red 12v constant power wire doesn’t send signal to my PCM for spark or my injectors ! Everything is connected correctly I over checked various times all grounds are connected as well and still no signal for spark or injectors ! Again don’t waste your time the wiring is probably all in the wrong places on pcm !

This is a decent wiring harness, it's NOT FOR AMATEUR. I would't call it plug-n-play.The wires aren't labeled, and the kit only has very basic instructions ( 4 single sided pages, mostly just hints and tips.) The instrument gauge wires aren't terminated with plugs, you must wire those yourself.The harness fuel injector plugs are EV1 style, this kit has adapters that attach to EV6 injectors.Check All Your Connectors beforehand! Two of the injector adapters didn't have fully seated pin locksYou will need the coil pack sub harnesses too, if your engine didn't come with them (another $40)The fuse/relay box is on the cheap side, usable but not OEM GM quality.The firewall grommet will slide a few inches, and some of the unterminated wires that are inside can be pulled out to the engine bay if you chose.It's actually a well built harness. The ecm, transmission, and sensor ends all appear to be good quality. I was expecting to see terrible quality at this price. I certainly wouldn't build a harness for what this one costs.Get a wiring diagram that fits with the ECM you are using, Check Your Connectors beforehand! Make sure the ECM pins match your harness, GM did change some pin positions over the years.I am not afraid of wiring and have plenty of experience building a wiring harness. I got this for an LQ4 and 4L60E.I will probably upgrade the fuse/relay box for something fancy, and I have a hand-held label printer to identify the circuits.So, yes I approve of this harness and would recommend it to anyone who isn't afraid of having to make a modification or two.I Hope My Review And Pictures Were Helpful To You!!

Garbage. Multiple computers and tunes and it Took hours to figure out that all the injector driver circuits have continuity across each other! Engine would not run. Had to overlay and rerun all 8 injector driver circuits. Buyer beware