Fuel gage not reading correct, is it c overed under gm extended warranty 31000mi on 2011 Buick Regal

Gauge goes ip and down , when filling up it stops but nevr r readd full on gauge

Asked by for the 2011 Buick Regal
It should still be under the factory warranty!!
1 more answer
should be covered under your 3yr 36k mile warranty