Are the H3 service manuals out yet?

For the average consumer, I don't believe so. Last time I checked, Helm didn't have them available. Release dates are late for service manuals from GM for non-dealer or employee personnel.
I do know they have had them available on DVDs for dealers (and me ), and of course the GM electronic system has had them since the vehicle was launched via GM's internal Intranet website, or via GM-Dealerworld which is a closed site (except for me ).