2017 Denali. My first electrical gremlin

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Boatguy

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So this just started. I filled up the other day and the electronic fuel “gauge” won’t go to full. It varies from 3/4 to 7/8 full. I topped it off a couple times and same thing. Ran a tank through it and filled it up—won’t go to full. Just wanders around between 3/4 and 7/8. It drops as fuel is consumed, but now I don’t trust it.

Hopefully, the dealer won’t tell me it’s “within spec” like they did with my douche-driving ACC.

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Denali4181

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Have you tried changing screens to see if it's the same with another theme? If if is you probably have a bad sensor.
 

AZ Rat

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Couldn’t it have nothing to do with the computer or screen but rather the ‘float’ or whatever is in the tank these days?
 

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