How hard would it be to drop in an LS2 into a 2003 Yukon?

Any modifications need to be done to the converter/flexplate?

Engine mounts?

Obviously need the PCM.

I've R&R'd the motor and tranny in my '93 Camaro before.

 

What motor does the Yukon currently have ... 5.3L? 6.0L?? As far as I'm concerned, there should be no physical differences between the two? The LS2 should bolt-up to everything no problem.

Just curious though, why are you considering this swap? If you want ~400 HP in your Yukon, just build the current motor up! You can get the power without the hassle of changing the computer . I mean, unless you just "happen to have" a wrecked GTO/C6 with a good LS2 sitting there, then for the cost of obtaining one, you could build / re-build your factory engine.

 

Its a 5.3L V8.

I just thought it would be easier to drop in a 6.0L LS2 rather than go to the trouble of stroking, boring, porting etc.

Are the heads on a 5.3L the same as LS1 heads?

Plus the LS2 wouldn't exactly stay stock for long.

 

I think the "trouble" of stroking / building a 5.3L would be easier than the TROUBLE of trying to re-wire a heavily electronic vehicle?! Problem is, the LS2's (Gen-IV small blocks) have slightly different sensors/locations on the motors than Gen-III motors (LS1's, and 5.3's/6.0's I believe ). And like I said, for the cost of buying an LS2, you could buy parts for your 5.3L and hop it up to make more than 400 HP! JMO.

EDIT: almost forgot, 5.3L heads have smaller chambers than LS1 heads, and some guys have swapped heads to boost the compression on their LS1's. SO, power wise, they should be good for your build-up.

 

try to find some car craft magazines or go their website, (early 2005 mags) they built a chevy ss pickup and got it to go 12.79 with a tq converter, headers blower and played with different intake boxes. from what i have heard, the 5.3 is very capable with cam heads and headers. ( a magnuson supercharger is always a plus) you could make that thing fast as hell and very streetable. i watched zoom from zzperformance (grand prix gtp people) take his yukon to 14.0's with just a supercharger so, for a lot less money and headache just build the 5.3!!!!!

my .02

 

Thanx for the info guys.

I like naturally aspirated. Who could I get headers and bolt ons from?