Ebay Gen 5 LS Wiring Harnesses? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

customfab4x4 · 04-13-2023, 08:15 PM

Ran into a LS guy in Houston while picking up a 9.76" rear axle. He does "budget" LS swaps. He said he buys all his harnesses off Ebay and has never had a problem. Unfortunately he couldn't identity which Seller he was using.

So wanted to ask you guys who have actually purchased a few if you can share your recommended Seller or Sellers?

I also read that PSI harnesses are simply generic $200 Ebay harnesses with a jacked up price point. They do sell direct on Ebay too but $700+ typically.

Thanks for the recommendations.

I am going to do a L87 6.2L swap with hopefully the 8L90 but am considering the 10L80 but leaning towards 2014-2017 years w 8L90L. Gotta a 1980 C10 and also a 1971 C10.

LS short box · 04-13-2023, 10:02 PM

My .02 is buy a LS harness/ECM from a vendor that has a proven track record of suppling a great harness and tech support. I've done dozen LS swaps for me and friends. I use Speartech and Howell. Tech support is only a call away in the states. Don't know about PSI.
In regards to the 8 speed they get zero love over on LS1tech.com.
I had a 2015 Silverado with the 6.2/8 speed combo. Always shifted hard when cold 1/2 and 2/3 shift. Even after back to the dealer for reprogramming. Also hard down shifts as I slowed down for a stop light. Never left me anywhere but I traded it before the warranty ran out.
Currently I drive a 2020 Silverado 6.2/10 speed. The 10 speed is sweet. The truck has settings for standard, sport and towing. Works well.

62c30 · 04-13-2023, 10:10 PM

I've got a BP harness and have not installed it yet but their customer service seems good from the conversations I've had with them. If I was going to go with a cheaper harness I'd probably go with one from speedway.

**mongocanfly** · 04-14-2023, 03:22 AM

your sorta right about PSi harnesses..but its the other way around..
china (maybe) ripped off PSI design and sell the copys on ebay.. even stole the instruction books
i can attest that PSI is good quality.. also heard alotta good about BP as well

PSI even commented on this thread about those
http://67-72chevytrucks.com/vboard/s...highlight=Ebay
And
http://67-72chevytrucks.com/vboard/s...39#post9196339

LS short box · 04-14-2023, 05:05 PM

If you go PSI I would with the braided wire covering instead of the ribbed plastic wire covering. I think it looks much better.

04-13-2023, 08:15 PM	#1
customfab4x4 Registered User Join Date: Apr 2023 Location: Dripping Springs, TX Posts: 9	Ebay Gen 5 LS Wiring Harnesses? Ran into a LS guy in Houston while picking up a 9.76" rear axle. He does "budget" LS swaps. He said he buys all his harnesses off Ebay and has never had a problem. Unfortunately he couldn't identity which Seller he was using. So wanted to ask you guys who have actually purchased a few if you can share your recommended Seller or Sellers? I also read that PSI harnesses are simply generic $200 Ebay harnesses with a jacked up price point. They do sell direct on Ebay too but $700+ typically. Thanks for the recommendations. I am going to do a L87 6.2L swap with hopefully the 8L90 but am considering the 10L80 but leaning towards 2014-2017 years w 8L90L. Gotta a 1980 C10 and also a 1971 C10.

04-13-2023, 10:02 PM	#2
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,927	Re: Ebay Gen 5 LS Wiring Harnesses? My .02 is buy a LS harness/ECM from a vendor that has a proven track record of suppling a great harness and tech support. I've done dozen LS swaps for me and friends. I use Speartech and Howell. Tech support is only a call away in the states. Don't know about PSI. In regards to the 8 speed they get zero love over on LS1tech.com. I had a 2015 Silverado with the 6.2/8 speed combo. Always shifted hard when cold 1/2 and 2/3 shift. Even after back to the dealer for reprogramming. Also hard down shifts as I slowed down for a stop light. Never left me anywhere but I traded it before the warranty ran out. Currently I drive a 2020 Silverado 6.2/10 speed. The 10 speed is sweet. The truck has settings for standard, sport and towing. Works well.

04-13-2023, 10:10 PM	#3
62c30 Registered User Join Date: Jan 2017 Location: Derby Kansas Posts: 358	Re: Ebay Gen 5 LS Wiring Harnesses? I've got a BP harness and have not installed it yet but their customer service seems good from the conversations I've had with them. If I was going to go with a cheaper harness I'd probably go with one from speedway.

04-14-2023, 03:22 AM	#4
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,587	Re: Ebay Gen 5 LS Wiring Harnesses? your sorta right about PSi harnesses..but its the other way around.. china (maybe) ripped off PSI design and sell the copys on ebay.. even stole the instruction books i can attest that PSI is good quality.. also heard alotta good about BP as well PSI even commented on this thread about those http://67-72chevytrucks.com/vboard/s...highlight=Ebay And http://67-72chevytrucks.com/vboard/s...39#post9196339 __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by mongocanfly; 04-14-2023 at 12:58 PM.

04-14-2023, 05:05 PM	#5
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,927	Re: Ebay Gen 5 LS Wiring Harnesses? If you go PSI I would with the braided wire covering instead of the ribbed plastic wire covering. I think it looks much better.



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