Fuel gauge has gone postal

[lickarock]

​Greetings to all. My fuel gauge has become possessed. Sometimes works fine. Others....not so much. Will start registering way to the right. At times almost to the 8 o'clock position, depending on how much fuel I have. What are the thoughts from you Bowtie Guru's?

[gmtech4]

Either the cluster or the sending unit but a scanner can verify or a garage

[8.1HD/ALLISON]

+1

 

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[servantsalesmen]

I have the same problem with my whole cluster. None of them work now. I just need to buy a new and redesigned cluster