Knocking fuel pump?

Blaze

The Jeeper Reaper
Joined
Aug 9, 2005
Location
Wake Forest, NC
Anyone ever have this? I've been having a weird surge problem with my Sierra and suspected it was fuel related.

This morning I started up the truck and it had a loud knocking coming from under the bed in the gas tank area. Didn't change with RPM, just a big knocking.

After I drove it to work, it had stopped.

Never had a fuel pump knock before, you guys think it is time for a replacement?
 
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