looking for GM Hummer corporate address

[vip808]

I need help finding GM Hummer corporate address. GM's website gives a p.o.box for theirs and a dead link to Hummer complaints (the vehicle dates only up to 2002)
I have some warranty questions that require my local Hummer dealerships parent company address. Any help or advise would be greatly appreciated.

[pugads650]

if there was ever a time this is not it lol.