The fuel gauge problem in by '98 Blazer is different, and I'd appreciate any help you can give. The gauge was jumping for weeks then finally died. I dropped the 18 gallon plastic fuel tank and replaced the fuel pump and gauge sending unit. Still no gauge... Is there a ground somewhere that might be bad?

Thanks

Tom

 

Sorry for such a late response. I do not know if you still need help with this. I would monitor the fuel sender output with a scan tool capable of such monitoring. If you get a reading and it fluctuates when you jump on the back of the vehicle, then it is possible that the gauge in the cluster is bad.