Hope this can help someone. Was having issues with the light coming on. Sensor wasn't easy to find. I used this one ECH FLS892 (found at Napa website, said it wouldnt fit. Lol)

Standard Motor Products FLS318 should work (also fits Ram 6.7 diesel)

You CAN remove old one from coolant tank, I used a very large flat head. it WILL pop out (work it back and forth careful not to damage tank) Put some added sealant to o-ring to help seal/glue it in. use a large blunt object to pop it back in.

My tank was fine, so this worked perfectly.

 

What goes in must come out.

And then go back in.

Thank you for the info.