Intermittent Interior Brake Light

Hi guys, I recently upgraded my 2006 to a 2013 and at right about 5000 miles, I just started getting the interior brake warning light going on and off intermittently. I tried to read some other threads but nothing seemed to apply to my situation.

At first I thought the E-brake might be sticking due to snow/cold, but it's continued to happen even after being in a headed garage all night.

I just got the oil changed as well and the brake fluid level looks normal...it's not all the way full, but by no means low. Also, the truck is brand new so there would be no reason for the brakes to be low, thus pulling the fluid out of the reservoir down into the system.

The only other thing I notice it that it was coming on driving uphill, but seemed to go off downhill...for the most part. That wasn't 100% consistent and the rest of the time it just seems random...

 

Add some brake fluid.