APPLICATION: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Chevy, GMC, Cadillac and Hummer Vortec truck engines (DRIVE BY CABLE ONLY) w/ T56/TR6060 or non-electronic (TH350, TH400, POWERGLIDE, 700R4, 200-4R) transmissions using RED/BLUE 411 P01 PCM.

PARTS INCLUDED: Complete engine and transmission Harness, Instruction Manual

ADDITIONAL ITEMS REQUIRED: RED/BLUE 411 P01 PCM

CONNECTIONS FOR:

Fuse/Relay Box
Fuel Pump Control (Relay included)
Fan controls (Relays and fuse available separately KIT-1010)
Check Engine Light, Speedo output, Tachometer, OBD2 Port
IAC and TPS on DBC setups
MAF Sensor
MAP Sensor
Engine Coolant Temp Sensor
Alternator Control
(2) Upstream Oxygen Sensors
Crankshaft Position
Camshaft Position
Fuel Injectors
Coil Packs
Automatic or Manual Transmission control
Knock Sensors

Connections from the Harness You Will Need to Hookup:

Fuel Pump (Required)
Switched Ignition Power (Required)
Malfunction Indicator (Check Engine, MIL, CEL, ETC.)
Speedometer
Tachometer
Fan 1 Relay Control (Low Speed or Single Control)
Fan 2 Relay Control (High Speed or Second Fan Control
Fan Relays available separately KIT-1010

NOTES: These Harnesses are designed for retrofitting '99 - '03 Vortec engines (4.8, 5.3, 6.0, 6.2-Liter) and Manual or Non-Electronic 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. 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. All Harnesses require PCM VATs removal, available through PSI. Please contact PSI for more information.

Write a Review
- 10/01/2024
  
  Should have bought this to begin with.
  
  I fought spend a bunch of money on a harness. After wasted time and wasted money I broke down and bought my PSI harness with in an hour I had my project running. Best money spent on my project.
  
  LeroyWinkins
  
  -
  
  Oklahoma City, OK
  
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- 07/05/2024
  
  Great product
  
  Product is exactly as described, shipped and showed up very fast.
  
  Dylen W.
  
  -
  
  Battle Creek, MI
  
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- 06/08/2024
  
  1985 C-10/LM7
  
  I tried to pin out my original wiring harness, only to be left with an engine that did not start. PSI sent me a harness within 4 days of ordering, and it cranked the second I plugged everything in. This is a no brainer. Spend the money, and do it right the first time. You won’t be upset that you did!
  
  Devin
  
  -
  
  Haughton l, LA
  
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- 06/07/2024
  
  Wire and Fire........
  
  Catchy moto right?
  I run a custom built "rock crawler" with a 6.0 LS, stock wiring harness and ECU. After several recent "dead engine incidents" that couldn't be traced or identified, we decided to replace the wiring harness and ECU. After looking at many options and reading lots and lots of reviews I called PSI and was convinced they were the best.
  Upon receipt I was concerned with the length differences between my old harness and the new PSI configuration. However, I was pleasantly surprised how simple, clean and custom fit the install went. In addition, I ordered the ECU with a semi custom tune that they programed to my performance cam and fuel injectors.
  After two hrs determining the perfect pathway, the moment of truth. Power on, Push to start and "Blast Off"! the engine runs and sounds perfect. Money and time well spent.
  
  Spencer B
  
  -
  
  Dallas TX
  
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- 05/13/2024
  
  Supports the Newb!
  
  My first LS swap LS6 in a ‘67 C10 Step and so I asked dumb questions. PSI took the time to answer my questions regardless of how basic and then delivered a beautiful product. So glad I didn’t do one of those cheap stand alones ou there. PSI is the best!
  
  Stuey
  
  -
  
  Steamboat Springs
  
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- 04/20/2024
  
  Square body
  
  Best harness works perfectly you get what you pay for tried a ebay harness and nothing but problems would recommend psi to my friends
  
  Richard Dishman
  
  -
  
  Pikeville Tennessee
  
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- 03/01/2024
  
  LS SCRAMBLER
  
  harnesses always work perfect and are very nice quality
  
  foreigner
  
  -
  
  Charlotte
  
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- 10/08/2023
  
  Woah
  
  This thing is legit. I suck at wiring and initially tried to rework my gen3 lm7 harness myself for my swap. It wasn't going good. It technically worked but I'd feel nervous to drive it further than to work. A shop advised me to get this harness for reliability and appearances and it was well worth it! Fantastic quality, labeled really well, and it came 4 days after I ordered it!
  
  Snipax
  
  -
  
  Richland, WA
  
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- 09/20/2023
  
  Best quality harness on the market
  
  I have had many harnesses and PSI is the best harness out there easy install and looks factory and plugs in like factory. My tuners in NJ and NC even says these guys make good products! Overall super happy with my two harnesses and computers, about to order another one too!
  
  ZachP
  
  -
  
  New Jersey
  
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- 03/28/2023
  
  Conversion harness and ecu tune
  
  This is my second harness with psi. Both times they are patient with my questions and answer them with reassuring knowledge. My first harness and tune had me scared of my car! I did 100 burnouts through all three gears! They did the tune on a bench! The harness got damaged and I had to upgrade the transmission to a t56. They tried to fix my old harness but they have too many updates to it. They took amazing care of me as a second customer and made it an easy decision to get and new one. I recommend the braided housing. It looks amazing! These guys are great!
  
  Novaman
  
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  Florida
  
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Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI Harnesses are Made in the USA and are 100% Computer Quality Tested. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion!

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99 - 07 Gen 3 Vortec (24X) Drive by cable T56/TR6060 manual transmission Standalone harness

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