I own a 2012 Chevy Silverado 1500 4wd work truck. Where can I find a complete repair manual similar to the ones made by Chiltons. Do they still produce them?

You can go to Alldatadiy.com and get the info you need there.

It looks like Haynes and Chilton have already put books out for this truck. Ebay has a fairly broad selection. You should be able to get those from some parts retailers as well.

I always favor going for the FSM (Factory Service Manual) myself, and I would normally recommend it for everyone else looking for the book of books, but they are normally not $430 and 7 volumes, which is apparently what your application is running: 2012 Chevy Silverado TRUCK GMC Sierra Denali Service Shop Repair Manual Set | eBay