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Yes, the fuel filter was changed about 3 months ago. Taking to a mechanic today, so we'll see how it goes. Thanks for all your help.

Thanks dude. I will try this. I do notice that my fuel pump does sound differently that it normally does. It used to be kind of high pitched and now it seems to be a low hum. Does the fuel tank need to be dropped to replace it? Thanks

I have a 2002 Tahoe 4x4. I was having some problems starting it. It has been cranking too long prior to starting. My check engine light was on and the codes read P0171 and P0174. These related to the 02 sensors, so I went ahead and replaced them all. I also have cleaned the MAF and the Throttle...