If it is "stuck" on red, you can probably fix it. If it is totally dead, it might stay that way. But a "stuck" pixel will often be corrected. Use the Break in DVD (you can easily find it with a search over at AVS. You can also just put up an all White screen.
I have had a "stuck" pixel as well as two different "flickering" pixels in my Samsung plasma. All three eventually corrected themselves. With one of the flickering pixels, I only got it to go away by running the break in DVD.
I can't guarantee that it will come "unstuck". But certainly do not lose hope