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    1998 Suburban fuel gauge always on empty

    Hi all, first post on here. I have recently procured a 98 K2500 Suburban with the big 454. ~230k miles I am having several common issues with the gauges. The speedometer and tachometer are both reading about 30% high. At idle, OBD reports 700-800RPM, tach says ~1100. Speedo says 100 when OBD...
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