Squeak from newly bought truck

Just purchased my 2015 and now there a weird squeak that occurs up to 40 mph or so. But when I put on the brakes it seems the noise gets lower and or goes away.do you think it's just bad/warped brakes? Driveshaft is greased up as well

 

sounds like the wear indicators on your brakes. Take a look.

 

I was thinking the same but wanted another opinion before I buy a whole brake setup..thank you!

 

Nice looking truck by the way. I had one just like it. I loved that color. It was a great truck.

 

You can inspect the brakes to see if that's the issue before buying new pads and possibly rotors. Nice truck, and welcome to the forum.