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Painless Wiring 20205 27-Circuit Classic-Plus Customizable Chassis Harness

Manufacturer

Painless Wiring

<h3>About Painless Performance Products</h3><p>Few names in the automotive aftermarket carry as much weight in the electrical world as <strong>Painless Performance Products</strong>. <a href="/510-painless-wiring">Founded in Fort Worth, Texas in 1990</a>, the company got its start when co-founder Dennis Overholser sold his first wiring harness at the Pate swap meet in Cresson, TX — three harnesses that weekend, to be exact. Word spread quickly, and a legendary hot rod journalist summed up the experience so well that the company eventually took &quot;Painless&quot; as its name. Today, the brand operates out of a modern Fort Worth facility where all research, development, engineering, and manufacturing are handled entirely in-house — a point of genuine pride for a brand that has always been American-made.</p><h3>A Legacy Built on Engineering Excellence</h3><p>Painless Performance has never been content to rest on its reputation. The company has earned three SEMA Best New Product Awards and seven runner-ups — a remarkable track record in a category where most competitors have never been nominated at all. Painless was also named SEMA Manufacturer of the Year in both 2002 and again in 2010 and 2011, a testament to the brand&apos;s sustained commitment to innovation over decades, not just a single breakthrough moment.</p><p>What sets Painless apart is not just the quality of the wire and connectors, but the thoughtfulness of the system design. Every harness is color-coded, clearly labeled, and engineered to make installation as straightforward as possible — whether you&apos;re rewiring a vintage Camaro, building a Jeep rock crawler, or dropping an LS engine into a classic truck. The brand serves the classic car and truck, off-road, diesel, and racing markets with equal dedication.</p><h3>Chassis Wiring Harnesses</h3><p>The product that started it all remains Painless Performance&apos;s flagship offering. Their <a href="/510-painless-wiring-chassis-wiring-harness-14619">chassis wiring harnesses</a> span an enormous range of applications, from universal kits adaptable to virtually any build, to direct-fit harnesses engineered for specific vehicles including General Motors, Ford, Jeep, and more. Fuel injection wiring solutions cover popular engine families like LS, Vortec, LT1, TPI, Cummins, and Ford 5.0, making Painless a go-to resource for engine swap projects. Each harness arrives pre-terminated, color-coded, and labeled so builders can spend more time wrenching and less time puzzling over wiring diagrams.</p><h3>Fuse Blocks &amp; Power Distribution</h3><p>Complementing their harness lineup, Painless Performance produces a comprehensive range of <a href="/510-painless-wiring-fuse-block-2680">fuse blocks</a> designed for both OEM-replacement and custom wiring applications. Available in 14-circuit and 20-circuit configurations — including weatherproof versions for off-road and marine use — these pre-wired, pre-labeled panels arrive ready to install with mounting hardware, fuses, flashers, and a horn relay included. The CirKit Boss line takes things further, allowing builders to safely add fused accessory circuits to an existing factory fuse block without compromising the OEM system.</p><h3>Why Enthusiasts Trust Painless</h3><ul><li>American-made manufacturing in Fort Worth, Texas since 1990</li><li>Full in-house R&amp;D, engineering, and production</li><li>Broad vehicle coverage: GM, Ford, Jeep, off-road, racing, and diesel</li><li>Color-coded, pre-labeled wiring for straightforward installation</li><li>Multiple SEMA Best New Product Awards and Manufacturer of the Year honors</li><li>Dedicated technical support and customer service</li></ul><p>Whether you&apos;re tackling a frame-off restoration or a full custom build, Painless Performance delivers the electrical foundation your project deserves.</p>

Part Number

20205
08/14/2036 9:59 AM
Sale Price

$720.35

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Painless Wiring 20205 is a comprehensive 27-circuit wiring harness engineered specifically for 1973-1987 GMC and Chevrolet trucks, Blazers, and Suburbans, including C10, C20, and C30 models. This Classic-Plus harness simplifies the rewiring process for Square Body enthusiasts with professional-grade components and thoughtful design.

Key Features:

  • Factory-style bulkhead connector enables easy fuse block mounting in the original factory location
  • Pre-installed OEM-style connectors for headlight switch, dimmer switch, wiper motor, ignition switch, blower motor and switch, blower resistor, and instrument cluster
  • Custom-printed circuit identification on each wire using GM color codes for straightforward installation
  • 27 circuits provide ample capacity for factory and aftermarket accessories
  • Designed for C10, C20, and C30 trucks, Blazers, and Suburbans from 1973-1987
  • Eliminates the frustration of aged, brittle factory wiring

This harness combines the reliability of modern wiring technology with factory-correct connectors and color coding, making it the ideal solution for restoration projects or custom builds. Each circuit is clearly labeled, reducing installation time and eliminating guesswork. Wire your Square Body once and wire it right with Painless Performance Products.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Products specifications

Type

27 Circuit

WARNING CA Proposition 65 Message

This product can expose you to Lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.

WARNING CA Proposition 65

Yes

A O K

simple, quick, straightforward transaction

Was pretty easy finding what I needed. Couldn't find info on number of days it would take to get here, but I assume ETA of 5-7 days?

So far great, will need to see how fast this seller ships out & what arrives! Supplier Shipped our items very fast, got them in record time and items were as what the supplier said they were, we will buy from them again.

good service

site was the best online for determining fit for my lx wagon..

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