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Hello all I have a 2006 trailblazer Ls and Ive been trying to fix my gas gauge so far I have replaced the whole sending unit, I purchased a rebuilt cluster and I even replaced the fuel pump electrical connector and still nothing it just stays on E with the gas light illuminated please help
 

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2004 chevy trailblazer_ls
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Get a wiring schematic and find the wire that goes from the fuel tank gauge sensor to the cluster. If you disconnect that wire and ground it at the tank end, the gauge should swing to full, disconnect the ground it will go to empty.
If the gauge don't move, it's a bad wire or stepper motor, if it does, it's a bad fuel level sensor.
If you replaced the cluster and the sending unit, it's probably a wire.
Good luck.
 
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