If the fuel gauge quits working when you turn your headlights on (and your signal lights in the dash come on, along with the high beam indicator being reversed) then your ground is bad. Check the ground at attaches to the bolt on the emergency brake.
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)
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