2001 Deville press gas pedal and no power under load. on 2001 Cadillac DeVille

Engine runs fine press gas pedal and car loses speed under a load (uphill) on level surface can do the speed limit.

Asked by for the 2001 Cadillac DeVille
2 answers
Have you checked your fuel filter lately, possible
Engine run fine when I press the gas pedal stalls & won't pick up speed