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This can get to be a real hair puller, but maybe not. Disconnect the wire going to your tank, usually on the top and hard to get to. Turn your key on then ground the wire while someone watches the guage, which should go all the way to full. If it does "and be sure you have a good ground" the sending unit in your tank is bad. If it still doesn't move, your problem is in the dash gauge or wiring.

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Q: How do you fix the gas gauge on a 1997 Blazer?
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