GMC Sierra K15 Cab Chassis MPG by year — every rating on record
The GMC Sierra K15 Cab Chassis has a combined EPA fuel economy rating for 4 model years, from 2015 to 2018. Across those years its best rated version returned 18 mpg (2015) and its thirstiest returned 17 mpg (2015). The EPA record holds 6 configurations for this nameplate, most recently a Special Purpose Vehicle 4WD.
In the EPA record this nameplate also appears as Sierra K15 Cab Chassis and Silverado K15 Cab Chassis. The figures below cover every one of them.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2015 | 3 | 18 mpg | 17 mpg | #2 of 3 (50th pct) | 4-Wheel Drive | Gasoline or E85, Regular | Special Purpose Vehicle 4WD |
| 2016 | 1 | 17 mpg | 17 mpg | #2 of 3 (50th pct) | 4-Wheel Drive | Regular | Special Purpose Vehicle 4WD |
| 2017 | 1 | 17 mpg | 17 mpg | #2 of 5 (75th pct) | 4-Wheel Drive | Regular | Special Purpose Vehicle 4WD |
| 2018 | 1 | 17 mpg | 17 mpg | #2 of 5 (75th pct) | 4-Wheel Drive | Regular | Special Purpose Vehicle 4WD |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The GMC Sierra K15 Cab Chassis placed highest in 2015 at #2 of 3, and lowest in 2015 at #2 of 3. It spent 4 of its 4 ranked years in the top half of its class.
Every configuration on record
All 6 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2018 | 5.3L 8-cyl 4-Wheel Drive Automatic 6-spd Regular | SIDI | 15 | 19 | 17 | 676.5 | 17.5 | $3,650 | 523 | 3/10 |
| 2017 | 5.3L 8-cyl 4-Wheel Drive Automatic 6-spd Regular | SIDI | 15 | 19 | 17 | 676.5 | 17.5 | $3,650 | 523 | 3/10 |
| 2016 | 5.3L 8-cyl 4-Wheel Drive Automatic 6-spd Regular | SIDI | 15 | 19 | 17 | 676.5 | 17.5 | $3,650 | 537 | 3/10 |
| 2015 | 5.3L 8-cyl 4-Wheel Drive Automatic 6-spd Gasoline or E85 | SIDI; FFV, FFV | 15 | 19 | 17 | 676.5 | 17.5 | $3,650 | 537 | 4/10 |
| 2015 | 5.3L 8-cyl 4-Wheel Drive Automatic 6-spd Regular | SIDI | 15 | 19 | 17 | 676.5 | 17.5 | $3,650 | 537 | 4/10 |
| 2015 | 4.3L 6-cyl 4-Wheel Drive Automatic 6-spd Gasoline or E85 | SIDI; FFV, FFV | 16 | 20 | 18 | 638.9 | 16.5 | $3,450 | 507 | 4/10 |
How the rating has moved between model years
Comparing the best-rated configuration of each year. 0 of 1 year-over-year steps improved the top rating.
| Change | Best combined | Delta | Gallons a year at the newer rating |
|---|---|---|---|
| 2015 → 2016 | 18 → 17 mpg | -1 mpg | 676 gal |
What Sierra K15 Cab Chassis fuel costs over a year
At the EPA's 11,500 miles a year, the 2018 GMC Sierra K15 Cab Chassis burns 676 to 676 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.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $2,029 | $2,029 | $0 |
| $3.50/gal | $2,368 | $2,368 | $0 |
| $4.00/gal | $2,706 | $2,706 | $0 |
EPA’s own estimate for the 2018 model year is $3,650 to $3,650 a year in fuel, or $7,000 more than the average new vehicle over five years.
How it compares with other Special Purpose Vehicle 4WD
Across the 69 nameplates EPA classifies as Special Purpose Vehicle 4WD, the median best combined rating is 22 mpg. At 17 mpg the GMC Sierra K15 Cab Chassis is 5 mpg below the median, which is worth about $538 a year at $3.50 a gallon.
- All Special Purpose Vehicle 4WD 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.