Does anyone know where you can buy a new Driver side window track/rail or what ever the technical terms is? The one on my truck is messed up and the window will fall out if you roll it down to far.

 

Window regulator. Auto zone has them.

 

Autozone and O'Reilley's both have them. Alternatively you can check one of the reseller yards near you by searching your location on car-part.com. Sometimes you can get lucky if you have a Pull-A-Part near you. Depends on your budget and your time, but Pounder90 is correct: it's called a window regulator.

 

No, it is most definitely not the regulator, I've changed the regulator already. The actual track that goes around the outside of the window is what I am looking for. I ended up finding it listed as a "glass run"