I have been working the GMC booth for the past 4 years now at the American Quarter Horse Association World Congress. This year I have not had one person come up to me and even mention any issues with the aluminum heads.
Funny, this used to be the main focus of my discussions just a couple years ago. I have herd a few injector stories though. The vast majority of the people I talk to these days, own one, have driven one or know someone who has one and they are very happy with them.
P.S.
Kudos
Member #4883
My diesels
97 Chevy C-3500 Dually, 6.5TD
85 VW Jetta 1.6L N/A
85 Mercedes Benz 190D 2.2 N/A
85 Surburban 2500 4x4 6.2 N/A
83 Chevy G-30 Van 6.2 N/A