Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi I'm Reggie and I'm happy to help you. Your car needs to be scanned for codes in the engine and body control modules. And also the sending unit in the tank checked independently of the system.
The most likely cause being that you have eliminated the cluster is a faulty sending unit or ground for sending unit I have seen them short out and spike bcm and cluster. But in order to know for sure you'd do those test
Sir are you still working on this can i help you further
Sir I apologize if my method of explaining sounded confusing. Checking for the codes would be the first thing to do because that would be the easiest. Let me know if there is anything i can do to help you fix this.