Where to mount the ecm on a third gen transam ls1 swap?

I put mine in the stock location. there was really no "mounting" exactly. It will stay up on its own. I drilled a hole in the firewall for the wiring harness. I did my swap in a camaro but it should still work the same.



After I ran the wiring.


Under the dash before I closed up the dash.

Its in the sticky

https://www.thirdgen.org/forums/ltx-...third-gen.html
https://www.thirdgen.org/forums/ltx-...ing-under.html

Mines closer to the engine than others posted
http://i150.photobucket.com/albums/s...1/DSC01816.jpg
http://i150.photobucket.com/albums/s...1/DSC01803.jpg

i put mine in the stock location as well. I gutted a spare ecm harness bulk head to use the factory hole in the passenger fender well.

I wanted to run mine the same way, but I didn't want to lengthen all the wires. As it was they were barely long enough. Though it probably looks a lot cleaner than mine.

I cringe at how bad my first attempt looks at the pcm end, but it was my first time doing something like this, so mistakes were made while learning a lot. I'll probably pick up another harness to work on before the next swap and clean things up a bit.

as for now, it all hides behind the dash, so my bird's nest of a mess is out of sight

Same here Dan. I wish I would have cut each end even and had all my extensions be the same length, but I didn't and it was awful. I'm just crossing my fingers and hoping that all my solders will hold out ok and that none of the sensors will read wrong....