The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain > LSx Swaps

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-03-2014, 10:25 PM   #1
tex_waco_usmc
Project Heaven in my 67!!!
 
Join Date: Jan 2009
Location: Bosqueville, TX
Posts: 899
I found a motor but need harness and ecm...

I found a low mileage 5.3. It doesn't come with trans, harness or ECM. What are my options? Should I steer clear?
tex_waco_usmc is offline   Reply With Quote
Old 02-03-2014, 10:28 PM   #2
tex_waco_usmc
Project Heaven in my 67!!!
 
Join Date: Jan 2009
Location: Bosqueville, TX
Posts: 899
Re: I found a motor but need harness and ecm...

Oh, it came out of an 02 model pickup... Only 87K miles
tex_waco_usmc is offline   Reply With Quote
Old 02-03-2014, 10:32 PM   #3
lynnfield
The Waco Kid
 
lynnfield's Avatar
 
Join Date: Oct 2009
Location: Waco, TX.
Posts: 1,781
Re: I found a motor but need harness and ecm...

What year 5.3? I was at pick N pull earlier last week and they had a couple 2000/ 2001 trucks that had the ECM still there. Or you could contact Bill at BP automotive (270)805-1777, he can build you a harness and get you a computer set up ready to go. He did my stuff if you want to stop by sometime and take a look. Greg
lynnfield is offline   Reply With Quote
Old 02-03-2014, 10:33 PM   #4
lynnfield
The Waco Kid
 
lynnfield's Avatar
 
Join Date: Oct 2009
Location: Waco, TX.
Posts: 1,781
Re: I found a motor but need harness and ecm...

I believe those would still work. There was a truck and a tahoe, both 5.3's
lynnfield is offline   Reply With Quote
Old 02-03-2014, 10:40 PM   #5
Chrysis
Registered User
 
Chrysis's Avatar
 
Join Date: Jan 2012
Location: Farmington, AR
Posts: 53
Re: I found a motor but need harness and ecm...

I bought my 5.3 It didn't have the accessories, ECM, harness, nor transmission. If you like to do a lot of reading, don't mind asking questions, you can piece everything together.

If you are not in a huge rush, you can find some really good prices. I have been gathering parts for a few months. So far I have about $600 into my 5.3 and I'm getting close to dropping her in.

Last edited by Chrysis; 02-03-2014 at 10:48 PM.
Chrysis is offline   Reply With Quote
Old 02-04-2014, 02:04 AM   #6
BR3W CITY
meowMEOWmeowMEOW
 
BR3W CITY's Avatar
 
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: I found a motor but need harness and ecm...

I pieced mine together, its not that bad now that most of us have ironed out the DBW compatability issues.

Ideally, you need to look for a sourced ecm from a truck as similar as you can. This means finding one with a v8 and an auto trans as a starting point is your best bet. Make sure it falls into the correct year range as what you have. The basic rule of thumb is that a v8 auto swap with dbw, starts best with an ecm from a v8/auto with dbw.
Your tuner will program your VIN into the computer, and set things like trans type, wheel size, a/c functions, certain dbw settings etc...but its always easier to start with a known working pcm on that setup. Some "good" tuners still screw up segment swaps and other things.

Are you planning on running dbw? If not, then the above will get you most of what you need. You can buy the trans seperate, and many of us will recommend having a new harness made anyway. Once you decide on a trans, and other things like any changes to injectors, A/c or not, etc...then you have the harness tailored to that.
If you ARE running DBW, its more stringent. The above all still applies...but you need to then make sure that the Ecm, TB, and tac module will all come from the same year/vehicles. I can't remember when it started 02 or 03.
__________________
'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING

MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
BR3W CITY is offline   Reply With Quote
Old 02-04-2014, 04:58 AM   #7
ls1nova71
Registered User
 
ls1nova71's Avatar
 
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
Re: I found a motor but need harness and ecm...

Trucks went DBW across the board in 2003. Some SUVs had it as early as 2000 or 2001. I have only seen 1 pre 2003 truck that was DBW and it was built in Canada, not sure if that's why though.
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html

5.3 swap into my RUSTY '71 C10
http://ls1tech.com/forums/conversion...71-c-10-a.html
ls1nova71 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com