GMC Sierra MPG by year — every rating on record

The GMC Sierra has a combined EPA fuel economy rating for 25 model years, from 1989 to 2026. Across those years its best rated version returned 26 mpg (2020) and its thirstiest returned 11 mpg (2001). The EPA record holds 587 configurations for this nameplate, most recently a Standard Pickup Trucks 2WD / Standard Pickup Trucks 4WD.

Year-by-year EPA ratings

Where it has stood in its class

Ranked against every other nameplate the EPA filed under the same class that year. The GMC Sierra placed highest in 1991 at #2 of 2, and lowest in 2004 at #18 of 24. It spent 17 of its 25 ranked years in the top half of its class.

Every configuration on record

Showing the 400 most recent of 587 configurations EPA lists for this nameplate, newest first.

How the rating has moved between model years

Comparing the best-rated configuration of each year. 6 of 14 year-over-year steps improved the top rating.

What Sierra fuel costs over a year

At the EPA's 11,500 miles a year, the 2026 GMC Sierra burns 460 to 719 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.

EPA’s own estimate for the 2026 model year is $3,100 to $4,850 a year in fuel, or $4,250 more than the average new vehicle over five years.

How it compares with other Standard Pickup Trucks

Across the 36 nameplates EPA classifies as Standard Pickup Trucks, the median best combined rating is 21 mpg. At 25 mpg the GMC Sierra is 4 mpg better the median, which is worth about $307 a year at $3.50 a gallon.

• All Standard Pickup Trucks rankings — every nameplate in the class, best to worst.

Other GMC nameplates

Every GMC model compared → — all nameplates ranked by best combined rating, with what each one costs a year.