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  • Gen III (24x) DBC Harness LS &…
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Gen III (24x) DBC Harness LS & Vortec 4.8 5.3 6.0 6.2

$549.00
(55)

GEN III DBC HARNESS SELECTOR, Select the options below to build your harness. Use the pictures if you are not sure of what you have.

APPLICATION: 1997 - 2007  4.8, 5.3, 6.0, 6.2 CHEVROLET, GMC, CADILLAC AND HUMMER ENGINES (DRIVE BY CABLE ONLY) WITH 4L60E, 4L80E, or T56 TRANSMISSIONS

PARTS INCLUDED:


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ALTERNATOR TYPE
INTAKE MANIFOLD / MAP SENSOR TYPE (WIRING ONLY)
AC RECOGNITION (IDLES ENGINE UP)
DRIVE BY CABLE CRUISE CONTROL
ADD 4WD SIGNAL WIRE (ADJUSTS 4 LOW SHIFT POINTS)
ADD E85 FLEX FUEL SIGNAL WIRE
SELECT LOOM TYPE
ADD TCC/BRAKE SWITCH KIT
LS GAUGE INSTALL KIT (LS TO 1/8NPT ADAPTERS)
ENGINE TO CHASSIS GROUND STRAP KIT (RECOMMENDED)
ADD FUSE BLOCK MOUNTING BRACKET
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SKU: HAR-GEN3-DBC
HAR-GEN3-DBC
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Have questions, on a time crunch, or just need this quick?          Give us a call: 732-276-8589                                                              Email: CustomerService@PSIConversion.com

  • GEN III DBC HARNESS SELECTOR, Select the options below to build your harness. Use the pictures if you are not sure of what you have.

    APPLICATION: 1997 - 2007  4.8, 5.3, 6.0, 6.2 CHEVROLET, GMC, CADILLAC AND HUMMER ENGINES (DRIVE BY CABLE ONLY) WITH 4L60E, 4L80E, or T56 TRANSMISSIONS

    PARTS INCLUDED: Complete engine and transmission harness, Instruction Manual

    Harness includes Connections for:
    • Fuse/Relay Box
    • Fuel Pump Control (Relay included)
    • Fan controls
    • Check Engine Light, Speedo, Tach, 
    • OBD2 Port (DLC Port)
    • IAC and TPS
    • MAF Sensor
    • MAP Sensor
    • Engine Coolant Temp Sensor
    • Alternator Control
    • (2) Upstream Oxygen Sensors
    • Crankshaft Position
    • Camshaft Position
    • Fuel Injectors
    • Coils
    • 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)




    NOTES: These harnesses are designed for retrofitting '97 - '07 LS & Vortec engines (4.8, 5.3, 6.0, 6.2-Liter) into older muscle cars and street rods or newer non-emissions controlled vehicles. 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.

    All harnesses require a PCM with VATs removed, available from PSI PCM-1003

    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. 

  • Write a Review
    • Ls harness
      This is the only true option for any of your harness or ECM needs. PSI is the only place to shop for any LS swap needs. Do not even think of any other source. Dont waste your time on other vendors. PSI is the best!!!
      LS Pontiac GTO

      -

      Wisconsin

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    • Owner
      Always great products
      Dennis

      -

      Washington

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    • 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

      -

      Florida

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    • Long time buyer
      II have used psi for yours on all my customer builds, sales are very helpful, the products are well done, orders are shipped quickly and a very important extra is, when I call tech for a question they are experienced and helpful, and within a timely manner 
      Highly recommend psi for all your swap needs
      Fineline Restoration

      -

      Colorado

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    • Premium Harness
      I wanted an affordable standalone harness for my 68 C-10 LS swap but wasn’t willing to settle for a Chinese made harness on eBay. All the forums said PSI was the best and they were right. I spent a little more but it was well worth is. 

      The customer service at PSI is top notch. I called several times with questions and rarely waiting on hold and talked to very friendly and experienced reps. 
      Adam P

      -

      Destin, FL

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    • Best Purchase Ever
      I have used lots of harness from Psi over the years and newer had any problems, LS , Vortec and LT engines
      orion

      -

      Norway

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    • 2nd harness
      Great product second harness 1 have purchased and both times engine fired right up. I will always use you on a ls swap. Thank you
      Tiger1967

      -

      Colorado

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    • Great product
      The harness quality, fit and performance made it a great product and purchase.
      Lowagon.

      -

      New jersey

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    • Wiring harness
      Great product and supper friendly staffing.
      Lakeside Classics

      -

      Oklahoma

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    • Great harness
      This was my first LS swap and the wiring went smoothly. Read and follow the instructions. This is a great harness, a little pricey but the car fired 1st turn of the key. Instructions for the TCC brake switch could be better. Customer service was great.
      Grizwald

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      Buckley, Wa.

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    • Very helpful
      Haven't installed the parts yet but the customer service was excellent. Very helpful, very patient, and very knowledgeable!
      GasLight Apparel

      -

      California

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    • Psi harness
      Replaced my old harness with a new updated Psi harnesss and couldn’t be happier, looked factory and instructions were helpful and very detailed. The customer service and the tech was great with any concerns I had.
      Crosstie

      -

      South Carolina

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    • TIRED!!!!!
      Well, PSI saved the day. Been working on a 6.0 swap on my 66 GMC panel. Took the knucklehead route to save some bucks and went the Amazon/China route for the standalone computer harness. $300 bucks- wired wrong, car wouldn’t shift, had a short and huge misfires. 3 weeks trying to diagnose, tune and change parts- we ultimately found the cheap harness was bad. I called PSI crying, tech in the phone was amazing. Walked me through the order and expedited for me- he probably felt my pain. The harness was quick to install and fixed all my problems- laid a fat burnout in front of the house- my wife said thank you! Lol thx again PSI 
      Eddie P.

      -

      Covina Californian

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    • Worked 100% right out of the box
      A real person, in America picked up the phone when I called. Everything plugged in perfect, zero issues. Buy once, cry once. Very high quality harness.
      Cruiser

      -

      Missouri

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    • best swap harnesses on the market
      PSI is the only harness we use in our shop for any LS swap apps. great product, wire it up fire it up!
      Northeast GA Performance

      -

      Cleveland, Georgia

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    • Pretty easy plug and play
      Is pretty easy fucking play
      Tom Tom

      -

      Chicago il

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    • I have purchased and installed 5-6 and have been very pleased.
      I’ve purchased 5 or six LS harnesses with ECM and 4L60e module and have been pleased. The upgrade soft wire loom cover is easy to route and looks great. We are installing these on high end builds and our customers are very happy. Getting ready to order another harness this week. Keep up the good work.
      Dave

      -

      Jefferson City, Missouri

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    • Gen 3 dbc harness
      The harness was beautifully built and the wires were good thickness. Everything plugged right in with ease. The best part of the experience was the customer service. Gary was super helpful in troubleshooter a few user errors.
      Salem

      -

      California

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    • Great product
      Just as it says wire it up and fire it up 
      Jeep guy

      -

      Cordova Tn.

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    • works great
      works great. easy to follow instructions and great tech support. 
      86 c10

      -

      Louisiana

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    • Excellent
      Perfect in every aspect
      RANDY

      -

      Nashville, TN

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    • Great product
      Very clean and easy to install harness,I recommend PSI to all my customers
      Serg

      -

      Houston Texas

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    • i
      i
      PC

      -

      i

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      Overall it looks like everything is there and looks very well assembled. Have yet to install it when I have time to start on my 88 s10. 4L60e 4.8 swap. 
      Mfbell

      -

      Nebraska

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    • NICE HARNESS GREAT TECH SUPPORT
      Great instructions
      Great tech Support
      Atrain

      -

      ND

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    • Highly recommend
      This is the only harness I use we build about 40 cars a yr and won't use anything else
      Ariel

      -

      Stuart

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    • Best standalone wiring harness ever
      Would recommend psi conversion to anyone LS swapping Literally Anything easiest wiring harness ever took me 20 minutes to install and start the motor 
      Michael K

      -

      Pennsylvania

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    • DBC Gen III harness
      Great quality wires. Price could always be better but it was fair for the quality. The best part of the experience is the customer service. No price reduction is worth bad service. Gary in tech support is patient and friendly in addition to being a great resource to troubleshoot. I highly recommend these guys.
      Salem

      -

      California

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    • Best purchase ever
      Super stoked with the product! Really straight forward! Everything plugs up perfect! Fuse block is high quality no issues at all! 
      Escondido restomods

      -

      Escondido california

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    • Wired and Fired!
      After lots of difficulty from another vendor, someone referred ne to PSI. And, as promised, I was able to simply wire it up and fire it up!!!
      JimmyCraig

      -

      Fayetteville Arkansas

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    • Super easy
      So this was my first ls conversion. I have seen many wiring kits on ebay and amazon. Almost all where imports with poor reviews. Although they were less expensive i didnt feel comfortable with there tech support and quality. I am so happy i went with psi conversions, they walked me through the order process to ensure every plug  fit perfect. The quality of the harness and support from psi made what i thought to be the scariest part of the job actually the easiet part of the whole conversion …. Thanks you PSI team. 
      Farleyman

      -

      Jamestown nc

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    • Standalone harness
      Purchased the standalone harness for my 76 Chevy nova LS swap this harness was the best easiest way to wire up my motor to the car highly recommend this harness definitely will use again in the future
      Michael K

      -

      Pennsylvania

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    • Awesome Product
      This harness was perfect and made wiring up my LS swap a breeze. The quality and cleanliness is amazing and looks better than OEM. PSI is also a great company to deal with as well. They cover all the bases and ask every question when it comes to nailing down exactly what harness your project needs. They know what they’re doing when it comes to LS harnesses and it shows. Can’t recommend them enough.
      Wes

      -

      Collierville, TN

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    • 84 Jeep CJ7 LS 5.3
      The wiring harness was easy to install plug and play per the instructions. Matched with PSI computer it started and cycled to idle immediately. Very Happy with this system !!!
      Classic Joe

      -

      Spanish Fort Al

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    • Nice harness
      Harness plugged in perfect
      Money

      -

      Valley Al

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    • Great product
      it came with instructions & emailed a set. Everything is top notch.
      Coweta

      -

      Newnan,Georgia

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    • best so far
      i recommend psi harness over most ever one out there so far looks and fits like i want it to. made with quality wire and connector. only thing i would like would be a little faster turn around getting the harness. I know how it is getting help to get thing done. and under stand the delay thank you for all your help keep up the good work.
      twins auto

      -

      Omaha Nebraska

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    • Gold Standard
      Great Harness. Looks and Performs Perfectly. Base Tune was on point too!
      Az High Test

      -

      Arizona

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    • top quality ,
      used them on a few projects here in Australia new had any issues
      swifty

      -

      Australia

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    • LS Harness Review
      First off the customer service is awesome. I had a couple questions and a problem wish turned out to have nothing to do with the harness or computer. everything was plug and play and worked amazing. Nice and clean install. My only real complaint about the product is the fuse block and the fact it doesn't have a oil pressure connection. The wires come straight out the back of the block making it hard to mount in the tight place I had. Other than that it is a great product by great people. Had a tuner tune my jeep for the cam with zero issues and i'm on the road like it was from the factory. Wouldn't hesitate to buy another kit. 5 Star
      Sean

      -

      Austin,TX

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    • Great craftsmanship
      This harness is truly plug and play. I had no issues connecting and getting my swap started.
      Brandon C.

      -

      Louisiana

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    • Great piece just not fully customizable
      It’s a great looking harness and good price
      Hirocious

      -

      Norman Oklahoma

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    • Simple as can be!
      Total of 30 minutes max to install once reviewing paperwork. Clean product and can't wait to here it run soon.. also great customer feed back over the phone and quick to fix any issue.
      @ryuk3n

      -

      Texas

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    • Best ls swapp harness
      Fit like a glove makes engine bay look marvelous you able to tuck the harness a way and make the engine look amazing
      Carlos

      -

      Dallas tx

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    • Don't hesitate
      I've tried the depinning my 5.3 harness, cheap china harness, and had to come to grips and purchase this PSI drive by cable harness, and I have no regrets, my 1966 Caprice started right up, thanks!
      PSI team...
      Jeffrey

      -

      Bellflower, CA

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    • ls harness
      psi makes the harness very simple. and the car fired up the first time also my sales person dominic was very helpful and patient thank you 
      daveb

      -

      north highlands ca

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    • 1019 Harness
      The guys at PSI were very helpful when it came to picking out the harness I needed. Especially since I had a mix/matched combination. It is outstanding quality! The last swap I did I had the harness cut down and ended up having to make my own fuse panel and all. Such a nightmare. Glad I went with The PSI harness. Highly recommend and will definitely being using them again on future ls swaps! 
      Jerry Powell

      -

      Prattville, AL

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    • Can not say enough about the whole expirience.
      There might be other products out there for less, however the product support Can NOT be beaten. There are alot of issues when swapping any modern engine into any vehicle and even a seasoned pro needs a second opinion to ensure its all being done right. The answers come from PSI's team and they come fast n friendly. Thanks to everyone at PSI.
      El Es Roy

      -

      sacramento

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    • Customer Service
      Hats off to PSI’s customer service, i couldn’t get my car started for a few weeks, I finally called Gary and he assured  me it would start on my next off day, he stayed on the line with me until it did. A+++
      504Bricks

      -

      New Orleans LA

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      Yes (1)
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    • 51 chevy
      Bad ass!! Plug and play as advertised. Makes Holley products look like poo!
      Ziggy Morrow

      -

      Houston, Tx

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      Yes (1)
      No (0)
    • Best harness ever
      Thanks 
      Extreme Lsx

      -

      Haltom city tx

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      Yes (1)
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    • excellent harness
      this was simple and laid out perfectly. the best harness out there
      rca

      -

      empire,alabama

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    • This is the best part of the LS swap!
      I have used 4 of these! They are easy to install, very well built and I will be buying these for every swap that I do from here on out!
      2tontruck

      -

      Omaha

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    • Best Priced LS Harness Period
      Great quality, price and service.
      STAN D LONEHARNESS

      -

      NJ

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      Yes (1)
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    • PSI CONVERSION HARNESS
      EXCELLENT QUALITY AND SUPPORT
      STAN D LONEHARNESS

      -

      NJ

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