Ok I am not sure if this is normal or not. I just bought an 05 impala (3.4L) a few weeks ago. I didn't really take notice to the noise when I was test driving the car. It seems like when I press the accelerator slowly it sounds like I can hear fuel being pushed through the line. The noise seems to be coming from the passenger side of the engine compartment. I am assuming that that the line runs on that side of the vehicle. I saw a service bulletin stating that w/ the 3.4l that the fuel line is noisy and makes a whistling noise.

You saw the service bulletin ? if it's covered under the warranty , I would get er fixed.

I am wondering if it is something w/ the engines. My parents impala (same year make and model) does the same thing. So does my buddy's camaro w/ the 3.4l engine. Odd.

My 05 with 64K has done it since it was new..3.4 engine...

I've seen quite a few GM vehicles that make that kind of sound from time to time. Is it constant? On dad's old truck it was water/coolant moving in and out of the heater core or some such thing.

what's the bulletin?