: LS7 V install

cts-v ls6
10-27-07, 04:08 PM
Hey, guys,

Just pulled the trigger and bought a LS7 crate motor, brand new, less ECM, harness, starter, and alternator. I'll put it in my '04 V with 122k miles and sell the LS6 that has 118k miles with Patriot Stage 2 heads. It's running smooth as silk.

Can anyone help with sources for ECM, harness, or anything else needed? I'm aware of Katech and Ultimate Motors. Anyone else I should contact? I need to talk to c5racr but his box is full.



10-27-07, 04:15 PM

10-27-07, 05:48 PM
LS7? Holeee Sh*t! I know you'll keep us informed on the progress. I'm jealous and good luck.

10-27-07, 05:52 PM
Bad A$$ motor, keep us informed on the progress and the results (pic's a plus).

Will you be doing the install yourself?

10-27-07, 06:32 PM
Dude... You soooooo beat me to the punch on this... Cant you get a harness and PCM from GM? This will be a 17000.00 install when its all said and done... A hot rod shop would be able to find a custom harness...

10-28-07, 02:14 AM
You will love it. :yup:

10-28-07, 09:49 AM
122??? That's a lot of driving!!! My 05 came with 19K a couple months ago.


What mods are going in with it?

10-28-07, 11:10 AM
Jack, your stock PCM will run a LS7 if the reluctor wheel is changed to a 24x along with a few other minor changes.

Some high level info -> http://www.cadillacforums.com/forums/cadillac-cts-v-series-forum/83578-new-project-ls7-04-v.html