Hi there, I have located a 2006 silverado with the l33 aluminum engine. I pick it up next week monday. I was just on Chevy's site and did a "build your truck" end noticed there was no Aluminum engine offered. Did they stop making it? Crap I hope not, I just spent a lot of money on this truck, not to mention the price of oil going up. Is the aluminum engine a proven power plant? I read no horror stories on this web site. thanks.