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Can you verify that your exhaust brake is OFF when starting truck? If it's on, try starting it with it off.
This, and make sure it’s not on High Idle either. Mine sounds more like a jet when it’s in high idle, but close enough to that table saw sound you linked that I can hear a similarity.

FWIW, I would double check everything on the exhaust to make sure it’s not touching anything it’s not supposed to. The jet sound is normal for a high idle, I almost wonder if the whine of your table saw is caused by a slight vibration somewhere along the pipe.

BTW, you nailed it with the description of a table saw, I wasn’t expecting the sound clip to sound like that but I’ll be damned :hehe:
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