2007-2009 5.3/LS Wiring harness

[MajesticZ]

Hello all! I’m finally doing the swap from a 4.3 to a 5.3 engine in the 08 sierra and I’m currently doing a write up. I’m trying to find an aftermarket wiring harness for the 5.3 but it has to been late 07-09 just like the engine itself and pcm as far as i know. I bought a jegs ATK engine 5.3 and this is the only piece i’m having trouble with. Painless does not have it for ls 2007+. Can anyone point me in the right direction?

[Sharpz]

yeah a Junkyard, or pull a part. 

[dtnel78]

Get ahold of Nordstroms Automotive out of Garrettson SD. They can get you a harness which will start in the $250 range then you'll have to send it out and have it done up. The guy I spoke with this via text late last night did a 60's impala LS upgrade and sent the harness and ecm to a guy off eBay. The guy tuned the ECM and had everything setup for when he installed the harness, ECM on the vehicle. 

 

He said if you look on eBay you'll eventually come across the guy. 

 

The guy I spoke with only did this for his vehicle as he's to busy running the Nordstrom Automotive Recycling being that he's second on the ladder below the owner so he said he can't recall who did the harness for him but it was a eBay guy  

 

Hope this is able to help you. 

 

https://www.nordstromsauto.com/

[dtnel78]

Did you have any luck yet? 

 

The guy I know @ Nordstroms gave me some information I forgot to share back with you. Wouldn't be to bad either as you could send the ECM and have it tuned as well. Send me a private message thru the system as well.