GMC K2500 Sierra 4WD Fuel Economy History

MPG by year — EPA official data.

Best MPG Year

1992

18 MPG combined

Latest Model

1992

18 MPG combined

Year	Engine	City	Hwy	Combined	Fuel Cost/yr
1992	Diesel Diesel	17	21	18	$4,700	Details →
1991	Diesel Diesel	15	20	17	$5,000	Details →
1990	Diesel Diesel	15	17	16	$5,300	Details →
1989	Diesel Diesel	15	20	17	$5,000	Details →