1997 GMC Surburban with 87K and 5.7L. The humming is present only when the engine is running, but does not change pitch with engine RPM. It sounds like it is coming from the fuel tank and I think it is the fuel pump. I removed most of the fuses one at a time and the noise persisted. When I removed the fuel pump relay the noise stopped, of course so did my engine.
Do you think I should replace the fuel pump, and how big of a job is it?
Thanks a bunch!
Tuesday, January 3rd, 2006 AT 11:12 PM