Ok it's probably been asked on here but how much would it cost to supercharge my ltz?

 

You're basically looking at a custom job, I don't know any supercharger kits for the 3900.

So find a good shop and have deep pockets :p

 

Pretty much - or do a turbo install, still going to be custom as there aren't any direct kits either, but turbos can be easily fabbed up to almost any engine.

Here's a thread on another 3900 owner that did just that, it's a bit long, though.
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