97 Blazer front wheel driver side rattle noise

Hello all. Anyone have any ideas on what would cause a rattling noise from my front driver's side wheel. The rattling sound starts when 13 mph or more is achieved and is constant.
No effect on handling or driving of vehicle though. Just sounds like something has come loose. Mechanics can't seem to duplicate when up on lift. Probably because i't only noticed at 13 mph and above.
I have a 97 4x4 Blazer 4.3L.
any ideas greatly appreciated.
Thanks

Hello all. Anyone have any ideas on what would cause a rattling noise from my front driver's side wheel. The rattling sound starts when 13 mph or more is achieved and is constant.
No effect on handling or driving of vehicle though. Just sounds like something has come loose. Mechanics can't seem to duplicate when up on lift. Probably because i't only noticed at 13 mph and above.
I have a 97 4x4 Blazer 4.3L.
any ideas greatly appreciated.
Thanks

Take the mechanics for a test drive. It's just that easy.

I would first check the dust shield for the rotors.