Our 10 Best Holley Ls3 Wiring Harness Of 2023 – Reviews & Comparison

In today’s market, what’s the holley ls3 wiring harness available today? It’s normal for customers to become overwhelmed while trying to discover a suitable brand for shopping due to the abundance of possibilities. There are far too many options on the market, many of which are low-quality knock-offs.

For your convenience, we’ve compiled a list of ten various holley ls3 wiring harness brand possibilities that we’ve examined and researched in order to assist you in making an informed decision.

10 holley ls3 wiring harness: Editor Recommended

10 holley ls3 wiring harness Review:

1. LS2 LS3 Standalone Wiring Harness w/4L80E Drive by Wire Fit for 2003-2007 Chevrolet GMC Cadillac Hummer Vortec Engine 4.8 5.3 6.0 Multec Injectors Plug 5 Pin MAF, LS Swap Wire Harness Green Blue ECM

Features :

  • Vehicle Compatibility – LS2 LS3 standalone wiring harness with 4L60E transmission fits for 2003-2007 brive by wire, fits 4.8 5.3 6.0 vortec engines, and IF EV6 needed, PLEASE leave message to us about your injectors plug, we will reply you within 12 hours, green/blue pcm connector & multec/delphi fuel injector connectors.
  • With Detailed Instruction – LS3 standalone wiring harness comes with a complete parts list install detailed instruction, standalone wiring harness weighs approximately 6.17 pounds and has a total length of approximately 90 inches, AND before using, please make sure that you have not replaced the original accessories, Note that harnesses are for non-emissions equipped vehicles and do not include air pump or EGR provisions, otherwise it will affect the use. 2-years shelf life.
  • Feature – LS2 LS3 standalone wiring harness are designed for retrofitting 2003-2007 4.8L 5.3L 6.0L Vortec engines and 4L60E 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.
  • High Quality Reinforced Ring Terminals – LS standalone wiring harness are completely plug and play with switched power, constant power and ground connections required. All harnesses come with the needed Dash Connections, which include Speedometer, Tachometer, Park Neutral, TCC, Malfunction Indicator, and a DLC Port.
  • High Quality Material – All wiring harnesses have a high quality grommet installed on the harness (that slides for desired mounting), use GM Color Codes, many standalone wiring harness do NOT Use GM Color Codes. LS standalone wiring harness allow for installing the PCM underneath the dash of your vehicle with a sliding grommet seals for that professional leak proof look.

Additional Info :

Color LS2 LS3 Standalone Wiring Harness

2. XTPTFABS 558-416 LS Main Harness Fuel Injection Wiring Harness Adapter Compatible with LS3-style MAP Sensor Adapter

Features :

  • √【Compatible with】: The 558-416 is an adapter harness that can be used to adapt any LS harness that uses an LS1/2 MAP sensor connection to an LS3 MAP. Also great for use with LS Hi-Ram intakes that require an LS3 MAP sensor.
  • √【Explain】:LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor.1× LS Main Harness.
  • √【High-Quality】:Made from high-quality materials for ultimate durability Manufactured to meet or exceed strict quality requirements.It is perfectly matched to the original vehicle after installation.
  • √【Simple installation】:Direct replacement, NOT require any modification.
  • √【Note】:Please confirm whether the parts conform to your car before purchasing.

Additional Info :

3. A-Team Performance – LSX Ignition Coil Extension Pigtail Wiring Harness 36″ Relocation – Compatible with LS LS1 LS2 LS3 LS6 LQ4 LM7 4.8L 5.3L 5.7L 6.0L

Features :

  • LSX Ignition Coil Extension Pigtail Wiring Harness 36″ Relocation
  • Compatible with LS LS1 LS2 LS3 LS6 LQ4 LM7 4.8L 5.3L 5.7L 6.0L
  • These extensions allow you to relocate all LS-based ignition coil packs
  • Gives greater flexibility with additional mounting locations
  • Weatherpack connectors that match the OE GM connectors for plug and play set-up

Additional Info :

4. ALLMOST 6inch MAP Sensor Adapter Harness Connects GM Gen 3 LS1 LS6 LS7 3 Wire to ZR1 LS9 LS3 L99 L76 3 Bar 12592525 MAP Sensor Gen 4 Gen IV, 6 inch harness

Features :

  • ▲6″ MAP Sensor Adapter Harness Connects GM Gen 3 LS1 LS6 LS2 to Gen 4 Gen IV LS3 LSA LS7 Style MAP Sensor
  • ▲This adapter harness will allow the late LS3 LSA LS9 ZR1 type Bosch MAP sensor to be used with LS1 LS6 LS2 LS7 type engine harness
  • ▲3 Bar LS9 ZR1 12592525 MAP Sensor length from end to end is approximately 6″
  • ▲Included components: MAP Sensor Adapter Harness Connector (6 inch )
  • ▲EXCELLENT SERVICE – The adapter harness comes with 12 months warranty.Just buy it with confidence

Additional Info :

5. A-Team Performance – LSX Ignition Coil Harness Pair 12 Inch and 4 Plugs Relocation – Compatible with Chevy Small Block V8 Gen. 293, 325, 346, 350, 364, 376, 427

Features :

  • LSX Ignition Coil Harness Pair 12 Inch and 4 Plugs Relocation
  • Compatible with Chevy Small Block V8 Gen. 293, 325, 346, 350, 364, 376, 427
  • Allows relocation of coil packs, one for each side
  • It gives a greater flexibility to move the coils off from the valve covers
  • This is for a pair of 12-inch relocation connector wires.

Additional Info :

6. Standalone Wiring Harness, Compatible with 2006-2015 LS3 LS2 6.2L Standalone Harness with TR6060 OR T56 58X Drive by Wire DBWZ, Swap Wire Harness, Stand Alone Engine Wire Harness Kit

Features :

  • 【OEM DESIGN】The standalone wiring harness is manufactured by an ISO-certified manufacturer, and meets the functions and specifications of the original manufacturer. Designed with convenient plug and play connectors (switched power, constant power, and ground connections required). A sliding grommet seal for a safer installation.
  • 【Premium Quality】The engine wire harness is made of high-quality copper core wires, which has lower eccentricity and resistance, anti-corrosion, wear-resistant, non-deformation, well performed in conducting electricity. The wrapped plastic surfaces can stand high temperatures, all kinds of chemical reagent, strong impact, and press.
  • 【Fits for】2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Corvette LS2 LS3 engines 6.2. The extra-long 15-18 feet wires help to conduct any wiring circuits. New GM Delphi connectors and TXL (polyethylene cross-linked) high temperature wires that meet GM specifications.
  • 【Complete Accessories】Professional installation is recommended (No Instruction Included). The ls wiring harness compatibles complete engine and transmission wiring harness including all engine and transmission sensor connectors, LS3 5 wire MAF, LS3 Map Sensor and EV6, LS3 injector connectors, NON VVT, Corvette or truck throttle pedal. We provide the directions which truck requires switching 2 pins in the connector. Wire harness connectors are universal color code.
  • 【120-Month Warrany】Be confident purchase the ls stand alone wire harness. If the engine wiring harness fails, cracks, stops working or any other problems, please contact us through amazon message directly. We offer a 10-year warranty, 100% satisfaction guarantee.

Additional Info :

Color Black

7. WMPHE Engine Wiring Harness Professional Standalone Wiring Harness with 4L60E Transmission Drive By Wire, with Wiring Guide Manual, Compatible with DBW LS3 Engines 4.8 5.3 6.0 2003 2004 2005 2006 2007

Features :

  • Note: This is gen3 blue green ecm connector. In order not to delay your time, please be sure to confirm whether it is suitable for you before buying. Green/ blue PCM connector & fuel injector connectors. Such as compatible with Chevrolet, GMC, Cadillac and Hummer truck engines 2003 to 2007
  • Provided: engine and transmission wiring harness including all engine and transmission sensor connectors, dash connections, which include speedometer, tachometer, park neutral, malfunction indicator, -TCC and a DLC port, complete detailed instructions
  • Replacement for drive by wire LS3 4L60E engine automatic transmission harness 2003 to 2007. 12-14 volts, suitable for 03 to 07 annual output automatic transmission gearbox, suitable for vortec 8 cylinders using 4L60E gearbox automotive, engine 4.8 5.3 6.0
  • A grommet is installed on the wiring harness, including wires, and the design of the sliding bellows sealing ring improves the durability of the wiring harness and allows professional leak proof installation
  • Please check whether it is suitable for you before buying, we recommend professional installation

Additional Info :

8. MOSTPLUS LQ4 LQ9 4.8 5.3 6.0 Injector to LS2 LS3 LS7 EV6 Wire harness Adapters(Set of 8)

Features :

  • Harness end on adapter : Male
  • Fuel Injector end on adapter : EV6 connector (LS2/LS3/LS7 style) Female
  • These connectors adapt the LQ4, LQ9 4.8 5.3 6.0 injectors for use with an LS2/LS3/LS7 (EV6) wire harness.
  • Quality: 8 Pcs;

Additional Info :

9. ICT Billet Wire Harness Adapter 6″ LS Gen 3 (III) Vehicle to Gen 4 MAP Sensor LS1 LSA LS3 OEM tooling, connector, lock, seals, and terminals WAMAP31-6

Features :

  • Assembled with OEM tooling, OEM (connector, lock, seals, and terminals),(uses OEM harness wire colors) for a perfect fit
  • Assembled in Wichita, Kansas with USA made OEM grade TXL wire
  • Adapt Your Factory Wire Harness With ICT Billet Wire Extension Harnesses To Accept Different Sensor Connector Styles
  • Wire Connector Adapter
  • Highest Quality Wire Connectors On The Market, For the Most Dependable, Longest Lasting Connections

Additional Info :

Color Natural
Item Dimensions
Weight 0.05

10. Camshaft Sensor Extension Adapter Wire Harness Cam 36″ fits LS1/LS6 to LS2/LS3

Features :

  • Camshaft Sensor Extension Adapter Wire Harness Cam 36″ fits LS1/LS6 to LS2/LS3

Additional Info :

Important Aspects to Consider When Choosing holley ls3 wiring harness:

How we Picked the Top holley ls3 wiring harness

Most of the items mentioned are not hand-picked. The list was generated by AI. But we can guarantee that every product included here has been tried and tested by real people, reviewed by experts, and recommended by real people.


Cost and performance are essential factors to consider when acquiring a holley ls3 wiring harness. More enterprises entering the holley ls3 wiring harness market means more options for quality and performance. The most expensive holley ls3 wiring harness does not always indicate the best decision for you and your money. Many low-cost models offer excellent performance and comfort.


A brand with high-quality products and outstanding customer service is the ideal choice for holley ls3 wiring harness. Good brand products are created with extreme care and precision, and they will always be available to answer your questions, correct any product flaws, or refund your money if any damage is found.


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Customer Ratings

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Keep in mind the item’s stability and control.
We consider the product’s impact on our lives and how we will feel when utilizing it.


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The manner a holley ls3 wiring harness is designed and built, as well as the material used, determine its durability. Select the holley ls3 wiring harness that can tolerate wear, pressure, and damage.

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What Are Today’s Most Popular holley ls3 wiring harness Models?

There are many holley ls3 wiring harness items accessible today for men and women seeking quality and reliability. Every holley ls3 wiring harness model follows the same essential premise. But they appeal to various users.
It’s no secret that certain products appeal to specific populations. What if you could see which products were the most popular across all consumers? You can, and we’ve got the list. Check out our collection of products that appear to appeal to all ages, genders, and locations.

How to Choose the Most Popular holley ls3 wiring harness

The three most crucial criteria to consider are price, quality, and popularity.
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Finally, while not as obvious as price or quality, popularity can be just as significant as both when it comes to attracting new customers.


1: How much is holley ls3 wiring harness?

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Final Thoughts

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