1999 tahoe
do some research. there is a ton of info on this swap and it is pretty straight forward. quick simple list is getting a donor motor (make sure you get a complete wiring harness with it), swap mounts (quite a few options here, google it), swap headers (not many options because of 4wd) or use factory manifolds. if you plan on keeping the 5.3 stock then keeping the 4l60e behind it should be okay, if you think you may upgrade later on for more power I would look for a 4l80e trans with which you will need a transfer case to go with it. you can either re-pin the factory 5.7 harness yourself to work with the 5.3 or send them out and have a custom harness done. I am planning on doing the re-pinning myself when I get to that step of my swap, I am still gathering parts.
Launching!
Joined: Nov 2010
Posts: 250
Likes: 0
From: Houston, Texas
The motor will go right in. I used the the Transdapt motor mount plates. They were available in town. I had to swap the flywheel to a non-dished. Excel Parts had it with the bolts for ~$70. Had to use the 1" setback position on the motor mounts. I reused my alternator. The radiator and hoses hooked right up. Still waiting to get the e-fans going.
Definitely just get a harness from somebody good and call that done. My ECM is located where the old ECM was. I left the battery on the passenger side. I converted my A/C to be controlled by the ECM, too.
I've also removed my ABS. I installed hydraboost from a van and now my brakes rock.
I found a H2 CAI that put the air filter pretty near the original location. Final decisions on how that will end up are still formulating in my pea-brain.
I can't find the original article for the 'Lisa' swap that was done in a magazine, but that's how I started (Edit: Found it! Se below...). It's not too much like that now. They left the old ECM and added the new one, too. That got old pretty fast. Not sure if the old ECM was required for the ABS, or not.
The original Fuel Pump works fine (if you've got the in tank EFI). I used some 'repair' lines to connect the factory fuel lines up the firewall to the rail.
I mostly hacked mine together and fixed what didn't work well as I needed to.
-KP
Definitely just get a harness from somebody good and call that done. My ECM is located where the old ECM was. I left the battery on the passenger side. I converted my A/C to be controlled by the ECM, too.
I've also removed my ABS. I installed hydraboost from a van and now my brakes rock.
I found a H2 CAI that put the air filter pretty near the original location. Final decisions on how that will end up are still formulating in my pea-brain.
I can't find the original article for the 'Lisa' swap that was done in a magazine, but that's how I started (Edit: Found it! Se below...). It's not too much like that now. They left the old ECM and added the new one, too. That got old pretty fast. Not sure if the old ECM was required for the ABS, or not.
The original Fuel Pump works fine (if you've got the in tank EFI). I used some 'repair' lines to connect the factory fuel lines up the firewall to the rail.
I mostly hacked mine together and fixed what didn't work well as I needed to.
-KP
Last edited by kpeters59; Apr 19, 2018 at 10:11 PM. Reason: Found it...Thanks to the other thread!
