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🔧 Wire your LS swap like a pro—no guesswork, just power.
This 5.3 Wiring Harness by Goopool is engineered for LS1 engine swaps in Chevy, GMC, Cadillac, and Hummer trucks from 1997 to 2006. Featuring an extended 36" cable for flexible PCM mounting, color-coded plug & play connectors, and a comprehensive wiring guide, it ensures a smooth, reliable installation. Crafted with premium copper wiring and equipped with durable grommets, it delivers lasting performance. Backed by responsive 24/7 customer support, this harness is your go-to for a flawless LS swap experience.
| ASIN | B09NDD3V71 |
| Best Sellers Rank | #24,916 in Automotive ( See Top 100 in Automotive ) #73 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | Goopool |
| Brand Name | Goopool |
| Cable Type | proprietary |
| Connector Type | Dlc Port |
| Customer Reviews | 3.9 out of 5 stars 191 Reviews |
| Included Components | Wiring Harness |
| Item Weight | 3.13 Kilograms |
| Manufacturer | KASSEN |
| Material | Copper |
| Material Type | Copper |
N**T
Inspect for defects before installation.
UPDATE: After contacting the seller, they took responsibility and sent a replacement wiring harness. I tested the replacement and it works correctly. Their customer service was responsive and professional, and for that alone they deserve five stars. Bought this in August for an engine swap. From the start, the vehicle didn’t work correctly. I initially believed the issue was engine-related, but after months of troubleshooting, it turned out the real problem was the wiring harness. The harness had incorrectly configured wires from the factory, which made the issue difficult to diagnose.
M**E
Time consuming but a good product
Everything lined up properly and was a bit difficult to install but is expected from a wiring harness. Just takes a bit of time!
J**L
Half of the connections were for a different vehicle
None of the connections are labeled, miscellaneous unconnected wires were in the harness, and finally half of the connections were for a different vehicle. They wasn't even for a LS platform. Wouldn't recommend it to anyone. I thought I would take the cheep way and found myself still having to get a higher priced one and missed my return window. Spend the extra money y'all
A**T
Solid Value, NOT A FACTORY REPLACEMENT. PAY ATTENTION.
Ordered as a replacement for a 1999 lm7 5.3 auto rwd truck. It could be made to work, but... Anyway, for the hundred bucks I am keeping it for parts or a stand alone swap later. Its set up for an F body car with the ECU in the cabin, Truck ECU is under hood with the boiling hot engine, its just how GM does things, anyway. Looks to be reasonably well made but read the fine print, it will require changes to things you might not want to deal with.
A**Z
Wiring ls swap harness
Wiring harness is perfect very well made perfectly packaged
D**E
Get EV1 to Multec injector adapters for $12
Decent quality for the price. However comes with EV1 to EV6 injector adapters. If you have a truck motor or gen 3 you will need to purchase a set of EV1 to Multec adapters. It would be nice if the connectors were labeled but for the price point it wasn’t bad. Worked well you just have to not be incompetent and unresourceful like some of the other people who reviewed this product.
J**D
Decent Harness
Ran this on a couple of LS swaps now, haven't run into any issues.
J**S
Worked
Worked on my 4.8 swap
Trustpilot
3 weeks ago
5 days ago