Yes, it has tubeless tires and they are in good shape.
The truck is at my place know and it's great.
Have to deal with a few issues but that's OK. It losses pressure after applying the brakes a few times and as mentioned before, the parking brake isn't working. Have to replace some gaskets and the taillights aren’t working.
You mentioned something about the parking brake knob and springbrakes. Below a picture of the knob. Is this of some help to determine if it has spring brakes. (sorry no pictures of the actual brakes yet).
https://goo.gl/photos/hQS5vHSZYJ82QpgB9
