RE: Is this a fuel filter problem?
I have a 2004 Silverado 4x4 extended cab (two big doors, two little doors) with 75,000 miles. It began to occasionally loose power when the gas gauge fell below one quarter. It acted like a classic case of a plugged fuel filter. Chugging on hills or with a loaded horse trailer. Then the problem began to show up when the tank was fuller or the load was less. Outside temperature doesn't seem to matter. The problem used to go away entirely when you fill the tank above one fourth. I believe there is an RPM governor that cuts the engine out at about 3,000 RPM and when this problem occurs the engine never raps above about 1,000 RPM. If the fuel filter is a lifetime filter, does this mean it shouldnt plug? I took it to the Chevy garage and they couldnt get the problem to occur when they were trying to diagnose it but they did not seem to subscribe to the plugged filter theory. Last night I was below a fourth, pulling a trailer with one horse on rolling hills and it finally quit altogether for the first time. I was able to restart it but not get above about 750 RPM. We towed it home and when the load was off the engine it ran ok again. I'm guessing its a fuel filter. Any suggestions?