My 98 has never had a working fuel gauge ever since I got it and changed the fuel pump. At the time I had bought a fuel pump off Facebook marketplace that was actually for a blazer but was brand new and it was all I could afford. It worked just fine although it was a couple inches shorter than the stock pump. I put 3000 miles on that pump without a working gas gauge (which sucked). The rear end went down in it and I decided to take the flatbed off for a easier time to change the rear end. I bought a new stock fuel pump of rockauto and put in it. I thought something was wrong with the sensor for the gas gauge on the old pump. No such luck. I have traced all the wiring and can't find any problems with wiring. All the schematics show a pink wire for fuel gauge but I have a blue with black stripe. Gauge used to stay on E and never moved at all. Now with the new pump when I turn the key on it goes to F then kinda flutters back down. It stops at 1/4 (where it should be) for a second or two, then flutters back down to E. Its like a fluttering/buzzing. Ill take a video when I get out there today to finish the rear end.