Jumping gas gauge?

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98sierraslt4x4

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I know I have the humming bird gas gauge but it also jumps up and down? Anyone else experienced this?

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df2x4

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jollyjerry

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Mine is about as bad as yours. It can get **much worse** than that though.
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My temp gauge reads low too (165 is more like 195), so I figure when the stepper motor gets worse, I'll fix those two together. Already tried replacing the temp sending unit, and the PCM reads the correct temp based on the obd2 reader so I'm not worried.
 
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