i have a 97 swb chevy truck with a 5.7 and auto trans.

my question is

i purchased a complete, i mean complete 2006 motor and trans,for my 97 and i have the motor mounts that i need for the swap it was part of the motor and trans purchase etc. im really ready to set the motor in place.:hyper2:
but i just need to know if i could just use the 2006 5.3 harness and just zip tie or whatever my 97 harness and just set it out of the way under the hood?
the 97 truck is unmolested never been jacked with as far as wiring harness goes, i have purchased a serv# 12200411 ecm. but never converted to the 411 ecm.
would it be a better option to convert over to the 411, so i could use my 97 wiring harness to run the motor and tranny of the 2006 5.3?
or could i just use the 2006 complete motor, trans, and wiring and splice in whats needed?
thanks
Ed

owowowowowo:wrongforu?????????????????

I'm not sure on the wiring harness questions, because I did the carburetor thing and used the MSD box. Try posting in the Conversion section in LS1tech or search through a few posts here in the classic section and see what members have done the swap and then PM them. Good luck man.

Ya man, poke around a little bit on LS1tech. I recall some one blended the 2 harness's and was able to use the 97 to run the 5.3 Or send them both off to speartech and see if John would blend them for you. Might save you some head ache.

Ya man, poke around a little bit on LS1tech. I recall some one blended the 2 harness's and was able to use the 97 to run the 5.3 Or send them both off to speartech and see if John would blend them for you. Might save you some head ache.

John is awesome i talked to him for a while and he has put some closure in my mind now.

Ls1tech has some good info! Make sure to keep us posted on your progress!

i just got done with a lq9 swap in my 98 chevy.. i recommend while the motor is out to take the heads off and have them re done with new seals. my motor was suppose to be in 100% perfect condition, i get it put in and #4 cylinder takes a dive for the worst. so i had to take the head off.
as far as wiring goes i think you will need to go with all new stuff. mine was a v6 though so i had to use all new and a new pcm of course. i had nelson performance do this for me, they did pretty good on it. he knows his stuff when it comes to this so if u have questions i would ask him. good luck with the swap
http://i70.photobucket.com/albums/i105/_Chevy_/newvids005.jpg

http://i70.photobucket.com/albums/i105/_Chevy_/rebuildmotor020.jpg

i just wish i would have done this before i had the motor in the truck

http://i70.photobucket.com/albums/i105/_Chevy_/newmotor011.jpg

theres the motor, it came complete and looked perfect :bomb:

god that would be my luck, i have a 5.3 out of a 06.
but if i do the swap i would just rather do the 6.0
i really cant make up my damn mind!!!
really just looking to buy a 99 or newer really and just sell my 97

Hey chevylee i got a question on your wiring set-up...
I'm doin a 6 liter swap myself and was wondering on how to change the
wiring over to the old harness..
I have the fuse block off the 04 lq4 i bought and the one out of my truck
can i just splice into the old fuse block with the new fuse block or am i goin to have to run all new wiring????:bang:
oh and this project is starting to worry me!!!

Ht383e Ftw!

Read this: the guy Mark at Street and Performance is a genius, and has done tons of swaps like this. I found this article when I was thinking about your same swap, and it helped out a lot. It took me a while to find but it dam near tells you everything you need to know, hope it helps:

http://www.hotrodlane.cc/PDFFILES/Lisa%20Tahoe.pdf

Wow good write-up, thank you!

Yeah dude, no problem. Everyone I talked to said it would be a nightmare of a swap, but I was determined to find a way to make it work. I almost gave up on searching for info on it when I finally found that

You dont have to run the old blackbox PCM piggy back with the newer PCM.

I would drop a 411 PCM into the 97 and use it to drive the newer 5.3. Throw an LS1 Camaro tune in the PCM for cable throttle or use an LS1 Vette calibration for a DBW application.

This guy dropped an LQ9 in his 95.
http://www.pswired.com/


He now has an 07flexfuel 5.3 with 6l80e 6 speed trans in it now.

peace
Hog

You dont have to run the old blackbox PCM piggy back with the newer PCM.

I would drop a 411 PCM into the 97 and use it to drive the newer 5.3. Throw an LS1 Camaro tune in the PCM for cable throttle or use an LS1 Vette calibration for a DBW application.

This guy dropped an LQ9 in his 95.
http://www.pswired.com/


He now has an 07flexfuel 5.3 with 6l80e 6 speed trans in it now.

peace
Hog

Thanks for posting that on the 95 truck. My dad has a 95 2wd, and we are trying to talk him in to doing a LSx swap on it.