Funny you say that, Paul. That was the first thing that caught my eye.
There is a car collector I know and he has a 67 that is very nicely restored and it too has the 'Caution' sticker.
During a discussion, at one of the car shows we attend, about the restoration I had asked why he put a non-GM sticker on the shroud.
He was quick to say that is how it comes and I diplomatically and politely said how GM did not place that on the Camaro when it left the factory, which isn't to say the dealer may have apply it later. He disagreed with me and asked me how would I know if I didn't work at the factory. That's usually when I realize it's pointless to try to convince otherwise and change the topic.
Mike