Dustytrix

iTrader: (4)

I have a 09 sierra with a 4.8 and its so weak I also have a LS6 block. I would like to know what it will take to convert the gen 3 block to work in my 09 truck. I have searched and can't find any info, especially swapping a gen 4 for gen 3. But I have this good block and would like to use it.

G Atsma

Just the block or is it a short block with rotating assembly? You might want to learn the differences between Gen IV and Gen III. The info is out there if you search right.

Dustytrix

iTrader: (4)

It is just the block. I searched the best way I know but open for advice

G Atsma

You can use the cam sensor from the present engine and swap everything over from the 4.8 to the LS6 block, except of course the rotating assembly. You will need a non-4.8 crank with the 58 tooth reluctor, plus rods and pistons for a 5.7. You are essentially building a Gen III block with Gen IV innards. A good balance job will be required.
Call WS6store and tell them what all you are doing, and they will help you out with everything you need at a good price and excellent customer service. There are many satisfied customers on these forums because of this vendor/sponsor.

Dustytrix

iTrader: (4)

Thank you G ,thats the info I needed.