weircc

iTrader: (6)

OK so I picked up a motor from buddy of mine said it was 5.3 with 4l60 when I picked it up I seen the trans was a 6l80 but motor I'm not sure a little input would be awesome!!

redtan

iTrader: (5)

What number does it say on the front of the block?

weircc

iTrader: (6)

With all accessiores on I couldn't see where would it be

Mavn

iTrader: (3)

What casting number is on the heads?

weircc

iTrader: (6)

799 and also can anyone confirm this being 6l80

redbird555

iTrader: (14)

that sure looks like a 6l80e to me, and the 799 heads along with the block number give it away as a 5.3 gen IV engine

Paul Bell

iTrader: (9)

The numbers in the last photo indicate it's a 4.8 engine. I'm pretty sure GM starting mating the 4.8L engine with 6L90 transmission starting in 2010 in vans & pickup trucks.

You need to find a tag or laser etching on the rear of the block just below the head on the driver's side to confirm.

http://engineguy.com/general-motors/...crc-vin-c.html