Phone tech support is included. We also provide these services. Mail order tune starting at $100.00, Base tunes starting at $100.00, Remote tuning starting at $200.00, Basic tuning training starting at $350.00 and Advanced tuning starting at $600.00.


We sell alot of different standalone harnesses, If you need a different harness then check out the link below.


https://www.ebay.com/sch/i.html?_ftrt=901&_fsradio=%26LH_SpecificSeller%3D1&_sop=12&_sadis=15&_byseller=1&_stpos=46342-3838&_odkw=&_saslop=1&_fss=1&_dmd=1&_sofindtype=0&_sasl=highperformanceinjectors219&_
osacat=0&_ipg=50&_ftrv=1&_from=R40&_trksid=p2045573.m570.l1313.TR12.TRC2.A0.H0.Xharness.
TRS0&_nkw=harness&_sacat=0


We have sold over thousands of harnesses. If you look at sold after clicking on all our different harness auctions and add them up you can see for yourself. When you buy from California, click the members name and you will see he is really based out of china as a member. Then click their feedback and click the negatives and read for yourself. China sets up in California because they know you wont buy from them if you see they are from China. We have lots of complaints from customers saying they returned their harness to them because they offer no tech support and know nothing about these harnesses. You can message them and see for your self. We also sell thousands of fuel injectors every year too.


03-07 LS VORTEC STANDALONE WIRING HARNESS DRIVE BY WIRE W/4L80E 4.8 5.3 6.0 EV6

FOR DRIVE BY WIRE THROTTLE BODY ONLY

 You will have to pin 2 wires to the blue retainer for 2nd vss, Comes with instructions.

 FREE ADAPTER Connectors TO CONVERT HarnessTO EV6 Injectors IF NEEDED.  No one else includes the connectors. Please put in the buyers notes if you need Ev6 connectors. If you forget we have to charge $12.95 later for shipping and handling


APPLICATION: 2003 - 2007 CHEVROLET, GMC, CADILLAC AND HUMMER TRUCK ENGINES (DRIVE BY WIRE ONLY) WITH 4L80E TRANSMISSIONS.

PARTS INCLUDED: Complete Engine and Transmission Harness, Instruction Manual

NOTES: These harnesses are designed for retrofitting '03 - '07 Vortec engines (4.8, 5.3, 6.0-Liter) and 4L80E transmissions into older muscle cars and street rods or newer non-emissions controlled vehicles. Harness allows use of the factory Vortec intake manifold and multec injectors with flex-fuel injectors (EV6) optional (Ev6 plug and play adapters request in buyer notes). They are completely plug and play with four wire hookup (switched power, constant power and ground connections required). Harnesses are designed with a sliding grommet seal and 4 - 5 feet of length from the rear of the cylinder head to the PCM mounting position under the vehicle dashboard. A sliding grommet seal allows for professional, leak proof installation. Harnesses are professionally constructed from Brand New GM Delphi Connectors and TXL (Polyethylene Cross Linked) High Temperature Wire to GM Specifications. All harnesses are 100% Quality Inspected prior to shipping. Note that harnesses are for non-emissions equipped vehicles and do not include air pump or EGR provisions. 

IN STOCK for SAME DAY SHIPPING

As you can imagine, there is a LOT that goes into making an engine harness. There is even MORE that goes into making a Quality Engine Harness!  Here at HP-INJECTORS, we have taken the initiative to purchase all of the PROPER PRODUCTION hand tools and Components to build the quality harness that you DEMAND and DESERVE.