2007 Isuzu Ascender Q&A

2007 Isuzu Ascender Question: How do I troubleshoot a fuel gauge error?

I have a 2007 Isuzu Ascender that after approximately 30-70 miles on a full tank of gas, the gauge reads empty and the low fuel light comes on. Is this a bad tank sensor? How do I troubleshoot this? -
Answer 1
ground the power wire going to the sending unit the gauge should go to full -
Answer 2
possible sender failure. may have to replace sender. -