??? not to swap motors

 

if you went from the 2000-2005 to the LS4 you would need to take the dash. I doubt you would need that for your swap.

I imagine it's mostly just the wiring harness, PCM, and engine.

 

I dont know about the dash/cluster, im pretty sure the only difference is that the ss cluster has some fancy white accents? Im not a mechanic so i have no idea what this has to do with an engine swap. As far as the PCM goes i can tell you what your looking at on the 3.5 V6. I bought a canned tune from overkillmotorsports and i couldnt be happier. Only problem is it did not get rid of my speed limiter as it mentions but this does not affect me as i dont go over 107 too often.... and i cant use the benefits of E-85 ever since the tune.

If you take apart your air intake box and have a look inside the box mounted on the bottom of it you will see 2 computer modules. One big one with tons of wires going to it is the main PCM module, the second component mounted standing upwards to the right of the main module is actually the transmissions control module portion of the PCM. The 2 components go hand in hand so when i bought my PCM from overkill i did receive both components because they do tune some major aspects of your transmission such as shift points.

I could not tell you if the 2 modules you will find in your 3.5 are the same as in the 5.3 but, the tune is amazing by far. Check out my thread incase you might be interested!

https://montecarloforum.com/forum/ni...rsports-29720/

Plain and simply there are not much for us to upgrade on our 3.5's other then the exhaust, intake and a tune. Ive done all 3 so far and i couldnt be happier, i love the 3.5. But i do wish you luck on whatever you may plan on doing with your monte!

 

what is your car putting down for HP after all of that? and what do you have for intake and exhaust? headerS?