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

Scroll Down To See Some Of Our Customers Finished Engine Wiring Harnesses

Every Engine Wiring Harness Has Been Reworked To Stand Alone In Any Vehicle.

All that is Needed To Run is Battery+, Keyed B+ and B+ From the Relays to the Fans and Fuel Pump.

Instructions, Labeling, Relays, Fused Link, High Temp Tape and OBD2 Port Included.

2013 LS3 Engine Harness With Manual Transmission with Fuse/Relay Block

Example #1

1999-2007 Chevy GMC 6.0L 5.3L 4.8L LS1 Vortec Engine Wiring Harness with Fuse/Relay Block

Example #2

2007-2015 Chevy Silverado GMC Sierra 6.0L 5.3L 4.8L With 6L80E 6L90E Engine Wiring Harness

With Fuse/Relay Block

Example #3

2004-2005 Cadillac CTS-V LS6 Engine Wiring Harness With T-56 CTSV T56

(with newest micro relays)

Example #4

1999-2002 LS1 Engine Wiring Harness from a 99-02 LS1 4L60E Camaro 

(with Newest Micro Relays)

Example #5

1996-2000 Jeep 4.0 4.0L Engine Wiring Harnesses and Battery/Alternator Harness

(with Newest Micro Relays)

Example #6

2006-2008 LS7 ZO6 Engine Harness With Manual Transmission with New Micro Relays

Example #7

2008-2009 Pontiac G8 L76 6.0L With 6L80E Engine Wiring Harness

(with older style relays)

Example #8


1994-1997 LT1 LT4 Engine Wiring Harness With 4L60E For Caprice Impala Fleetwood Roadmaster

(with older style relays)

Example #9

2001-2006 Vortec 8.1L Engine Wiring Harness With 4L85E Drive By Wire L8100 L 8100 8.1

(with New Bussman Fuse and Relay Panel)

Example #10

2004 Pontiac GTO 5.7L LS1 Engine Wiring Harness With 4L60E

(with older style relays)

Example #11

1996-1999 GMC Sierra Chevy Silverado Vortec 4.3L 5.0L 5.7L and

7.4L Engine Wiring Harness With 4L60E

(with new style relays)

Example # 12

New 1" High Temperature 205 Degrees Celcius 401 Degrees Fahrenheit Non Adhesive Dry Vinyl Tape

New Waterproof Fused Link for ECM PCM TCM

New Diagnostic Port

New Micro Relays

Add any length 12 Gauge leads for $55.00 more.

Add a Fuse Block with Micro Relays and any length 12 Gauge leads for $149.00 more



1999-2007 PCM

E40 and E67 ECM