I stopped at a red light and put it in 1st. As ( was turning I heard what sounded like a buzzing noise and I had no clutch. Prior to this it showeds no signs of a problem whatsoever. Amy ideas?

 

Define "no Clutch"

Can you push the pedal down all the way?

If so with engine running/truck stopped and clutch pedal is out all the way can you shift gears?
If so Clutch disc worn out, pressure plate stuck out, slave IN hose blocked so fluid can't get out and back to master

Is the pedal stuck at the top and you can't push it down?
Quick disconnect has come off

Is the clutch pedal loose?
Push rod has come off or pivot point has broken