whistling noise around the filter /fuel lines?

[lwalls]

2003 trailblazer Lt . when the motor is running the high pitch noise is coming from the fuel filter / fuel line area, if i crawl under there whil itd running i can get it to change noises when im grabbing the lines and filter but but it seems like it changes thje most when i mess with the hose where you hook a pressure gage up to it or bleed it

[Schurkey]

Noise from fuel filter area? Any chance the filter is partially-plugged leading to pressure drop and turbulence?

"I"'would start by checking fuel pressure; and check my notes and receipts to see when the filter was last replaced.

[j cAT]

Originally Posted by lwalls

2003 trailblazer Lt . when the motor is running the high pitch noise is coming from the fuel filter / fuel line area, if i crawl under there while it's running i can get it to change noises when I grab the lines and filter ,but but it seems like it changes the most when I, mess with the hose where you hook a pressure gage up to it or bleed it

I have seen that when the fuel filter restricts flow the pump gets louder. could also be restricted return line etc.