Damn thing keeps blinking... how do i fix it without taking it to the stealership?

It should still be under warranty, unless you have over 50k miles.

Have you had any tires replaced? The tire stores are famous for breaking the sensor when they break down a wheel and tire. If not, you can try a reprogram with your key fob and a magnet. Turn ignition to on position and hold down lock and unlock on your key fob until you hear a horn chirp. Then starting with the LF tire, hold magnet as close to tire pressure sensor(valve stem) as possible. You should hear a horn chirp after a few seconds. Then repeat with RF,RR, and LR in that order. You should hear a double horn chirp after LR, indicating the procedure is complete. If that doesn't work, you need a new sensor. Obviously, make sure your tire pressure is set before reprogramming.

Have you had any tires replaced? The tire stores are famous for breaking the sensor when they break down a wheel and tire. If not, you can try a reprogram with your key fob and a magnet. Turn ignition to on position and hold down lock and unlock on your key fob until you hear a horn chirp. Then starting with the LF tire, hold magnet as close to tire pressure sensor(valve stem) as possible. You should hear a horn chirp after a few seconds. Then repeat with RF,RR, and LR in that order. You should hear a double horn chirp after LR, indicating the procedure is complete. If that doesn't work, you need a new sensor. Obviously, make sure your tire pressure is set before reprogramming.
thank you so much

Not to change the subject, but.. Ya know Tonio? You're the last person I'd ever expect to see here.. What are you doing with a DeVille?