I just posted this in the 2007-2013 category of chevy trucks too, but I figured I would spread the message. I came across a business that specializes in fixing broken exhaust manifold bolts in Chevy and GM vehicles (more than just trucks). They have multiple different parts that will fit in a variety of different vehicles, and you dont have to remove the broken bolts. I have used them myself, and am pleased. So far so good. I thought I would save the hassle for some of you in this situation . . Home - Kral Auto Parts

 

I guess its an option. Any pics of it installed?

An experienced tech can remove the extracted bolts and complete the repair in 1.5hrs per side. no drilling or damaged heads. It is the better fix imo. the problem is when people try to drill and use extractors...never goes well.