[jpp3]

I have a 2005 trailblazer and i've had a similar problem. Mine started out doing what you are saying then it just stayed on E with the warning light on all the time. it was the fuel sending unit. The part was $120. They have to take the gas tank off to replace so it's about another $200 in labor. If you take it to the dealer they can check it. good luck. Mine has worked fine since getting it fixed