Swap question

Swatbwana · February 1, 2015

i have a 2004 denali c3 I would like to know the feasibility of swapping a 6.2 drivetrain into it from a newer denali 2007 and up, do I need the newer 6 speed or will the 6.2 bolt up to my tranny and would I need a custom harness?

oldscsc · February 1, 2015

Swapping from a Gen III to a Gen IV engine is a lot of work. You would need everything from the new truck, and probably some custom harness work as well.

For the money, you're far better off upgrading your current powertrain. Cam, intake, gears, head work, boost...depends how crazy you want to get. I'd hazard a guess that all of those options would be cheaper than a running 6.2 with trans, and WAY less work.

Swatbwana · February 1, 2015

Hmm, that's what I was thinking, so I will get a newish 6.0 and possibly lightly boost it, my truck is hitting 200k rebuilt front rear diffs tranny went trough tranny it looked very good transfer case rebuilt , will look at a lower mileage 6.0 and some modest mods, I drove my wife's denali 2008 and love the response and sound from the 6.2 the tranny was awesome as well. I guess a 6.0 with the proper tune would be just as good with mods a little better.