MY-EFI Since 2006

Professional Engine Swap Wiring Harness And ECM TCM PCM ECU Programming and Tuning Services.
Call us with your questions at 1-800-395-1208 or 518-410-3802 9AM-9PM EST or email

Professional Engine Swap and Conversion Engine Wiring Harnesses and ECM PCM TCM Programming and Tuning Services for all

1994-2017 LSX LS1 LT1 LT4 4.0 4.8 5.3 5.7 6.0 6.2 7.0 7.4 8.1 LM7 L59 LY6 L76 LS2 LS3 LS6 L99 LC9 LS9 LSA LS7 LQ4 LQ9 LS4 4.0L 4.8L 5.3L 6.0L 6.2L 7.0L 7.4L 8.1L Engines Chevrolet, GMC, Cadillac, Pontiac, Chevy, GM, Jeep and More

Below is another one of our finished Stand Alone Engine Wiring Harness. It was a Stock OEM Engine Wiring Harness. Completely redone inside and out with New Fuse and Relay Block, New Tape, New Labels, New Instructions and New OBD2 Port

All that is needed to run your engine is Battery Positive to the Fuse and Relay Block and Keyed Ignition Battery Positive. We also offer longer wire leads and fuse and relay blocks.

Finished 2013 Camaro LS3 Engine Wiring Harness with Fuse and Relay Block

Send In Your Stock Engine Wiring Harness and ECM To Us For Modifications.

We Modify Your Engine Wiring Harness Exactly How You Need It.

We Tune and Program your ECM PCM and TCM For Your Engine Swap

If you have ANY questions about our Services Call 1-800-395-1208 or 518-410-3802 9AM-9PM EST or email 

11 Years of Experience. 



What is being offered is a Service that takes your Stock OEM Engine Harness and makes a Stand Alone Engine Wiring Harness for any vehicle. This includes all 1994-2017 GM LSX LS1 LS6 LS3 LS7 LY6 LM7 L99 L59 LT1 LT4 Vortec, 4.8 5.3 5.7 and 6.0 Engines and Many More. A Stand Alone Engine Wiring Harness and PCM can go into any vehicle. You can also send in your PCM or ECM for Custom Programming. We use New 30/40 amp Relays, New Fuse Block and Relay Center, Add a New Waterproof Fuse Holder and Fuse for the ECM TCM PCM and use New 1" High Temperature Non Adhesive Dry Vinyl Engine Wiring Harness Tape. Every Connection is Labeled and Comes with Instructions.
  **We do not need the Plastic Bracket that mounts the ecm, Foot Pedal, TAC Module, Battery Cables or any other body harness or Fuse Blocks**


Your finished harness is custom and comes with new relays for the Fans, Ignition, Fuel pump and Air Conditioning along with a new diagnostic port. You can also have all emissions kept or removed so you will only be running 2 front, left and right oxygen sensors and the MAF Sensor. All a/c can be kept or removed if wanted. We build your engine harness exactly how you need it.


Injectors and Components
If you have broken or missing connectors, please expect to pay for new connectors unless you do not want any. Some harnesses we get in have cut wires, missing connectors and need repairs and this will cost a little more. Some connectors and wiring are $15.00-$25.00 a piece while some others are much less. Email us with any repairs that may need to be done and we can give you an estimate. Your engine harness will come back with the stock injector connectors that came with it. If you need LS1 EV1 or LS3 EV6 Bosch style added on to any harness.



We can Program your existing PCM, ECM and TCM. We can Tune to delete VATS and have Many other Parameters can be Changed in the PCM. Vats or Vehicle Anti Theft is deleted so that the engine will run.


Transmission and Emissions

You can usually run just about any transmission you wish. You can call and we will tell you if you can use it or not. If your transmission is electronic it has to be compatable with the PCM, ECM or TCM you are running. Your engine harness can have all emissions kept or removed so you will only be running 2 front, left and right oxygen sensors. A/C can be kept or removed from the harness. Many customers run Vintage or Classic Air.


Connections and Diagnostic Port

The Harness comes with a New and labeled Diagnostic Port that connects to your engine harness through your firewall to read DTC's. The engine harness comes fully labeled with instructions. New Relays and an ECM PCM Fuse and Holder is installed. Wiring the relays for the fans and fuel pump is simple. You just run Battery Positive, Keyed Hot and Hot to the Fuel Pump and Fans to complete. Relays: Fan 1, Fan 2, Fuel Pump, TCC Lockup, A/C and Ignition Relays. Output Wires: Tachometer, Oil Pressure, Speedometer, Malfunction Indicator Light (Check Engine Light), Serial Data, Battery Positive To the Fuel Pump, Battery Positive to Fan 1 and to Fan 2.




LSX LTX LS1 LT1 LT4 LS2 LS3 L99 LS4 LS6 LS7 LS9 LT4 LM7 LQ4 LQ9 L76 LY6 L59 LSA Camaro Corvette Roadmaster Caprice Impala LSX L33 Silverado Sierra Chevy Chevrolet Buick Cadillac Fleetwood S10 Jimmy Jeep Wrangler Dana Ford Mustang L76 4L60E 4L80E 4L65E 4L85E 6L90 6L80 6L80E DOD AFM MAF 6L90E 700R 700R4 TH350 TH400 Turbo 400 350 T56 T-56 Transmission LS 4.8 5.3 5.7 6.0 6.2 7.0 7.4 8.1 ECM ECU PCM Computer 4.8L 5.3L 6.0L 6.2L 7.0L 7.4L 8.1L Displacement On Demand Performance ECM PCM ECU Engine Computer Specialties T42 T43 G8 Corvette Silverado Sierra Camaro Impala lt1swap Caprice Roadmaster Fleetwood Cadillac Escalade Denali Motor VVT Variable Valve Timing Foot Pedal Throttle Body TB Connector 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 oxygen sensors o2 evap egr maf cat catalytic converters swap malibu chevelle nova datsun nissan BMW Porsche Jeep Suburban Diesel Hemi Vacuum Brake Booster Knock Sensor Map IAT IAC ECT engine coolant temperature water pump heads valves intake oil level starter fuel pump oil pressure tachometer tach MIL Check Engine Light Serial Data park switch tcc torque converter clutch alternator battery cable solenoid timing spark shift time pressure torque management abuse mode air conditioning a/c condensor switch can bus ground vcm blade bolt pin out schematic rework rewire plug and play plug n play holden gto 16188051 16214399 16227797 16242921 16238212 16227797 12635862 12576106 12624927 12642100 12633238 12625455 12597125 12612384 12612397 12597121 12602801 12602802 12586243 12586242 16263494 16250279 16244210 16208546 LS1 Wire Harness LSX Wire Harness LS1 Engine Wiring Harness LSX Engine Wiring Harness d850a 11515767 11509666 11516366 11516360 10284308 10275815 11516413 213-1545 12569240 16137039 213-185 12223861 213-1520 213-101 213-184 16040749 12569241 16040609