can't remove radiator cap?
 

Ok, I feel like an idiot, but I can not remove the radiator cap on my 02 trans am. I'm trying to flush the system but I can not get the cap off. I can turn it 1/4 turn to get it loose, but nothing after that.

Any ideas?

it only turns that far....then pulls straight up and off. Push down on it while turning

awesome! I did get it most of the way, but it just took a bit of extra "jiggling" to get it the rest of the way around.

Thanks for the tip!