My exterior color is silver, the interior is the same color as in your picture. I’m 1500 miles away from it for the winter, so I can’t send a picture.
I did look up info about the head stud problem. I hope Cadillac (it would now be GM Powertrain) has some kind of coating for the studs by now to prevent recurrence of the corrosion. If not, there is an aftermarket fix that uses studs with larger diameter in the block and a standard diameter for the head. These are much more complicated to install since they involve precisely drilling and then re-tapping deeper threads in the block.
Just as an FYI:
General Motors acquired Cadillac on July 29, 1909. Cadillac was founded by Henry Leland in 1902, and GM persuaded Leland to sell the company for $4.5 million in GM stock. Leland was allowed to retain his management positions within Cadillac after the acquisition.
I mention it only because Cadillac has been a GM product for over a century. Thus if you contacted GM, they would send you to the Cadillac division anyway.