Clicking when coasting

I'm experiencing a clicking sound when I coast to a stop. Usually 15-20mph or less. Only when I press the clutch pedal. When the truck is in gear and the engine is slowing it down I don't notice any noise. When I coast down my driveway the speed of the sound increases as my speed increases. I have a 2000 4.3l v6 with 5spd manual.
Thanks.

It May Be Something As Simple As A Screw In Your Tire. The Constant Click Of The Metal On The Road Will Increase As Your Speed Does.
Hope Its That Simple

I had a clicking that sounded like a lifter was stuck and it turned out to be my starter was loose... as in the bolts had backed out or vibrated loose. When i was driving it was more notible at slow speeds and it was very noticable at idle in my garage.

the speed of the clicking is much faster than the speed of the tires, however it does decrease as the vehicle slows down. it's fast like something hitting the spokes of a bicycle wheel.