GMC Sierra K15 — All Years
We have GMC Sierra K15 specifications on file for 9 model years, 2010–2018, covering pickup trims. Across those years EPA data lists 4 different engines. Combined fuel economy runs from 17 to 23 mpg (UK) depending on year, engine and transmission. 5 of the 8 rated model years hold an overall 5-star NHTSA rating. Select a year below for full engine, fuel economy, dimensions and safety data.
| Year | Engine(s) | Fuel | MPG (UK) | CO₂ g/km | NHTSA | Recalls | Complaints |
|---|---|---|---|---|---|---|---|
| 2018 | 4.3L 6-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 20–23 | 295 | 5★ | 7 | 304 |
| 2017 | 4.3L 6-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 20–23 | 295 | 5★ | 6 | 429 |
| 2016 | 4.3L 6-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 20–23 | 296 | 5★ | 8 | 49 |
| 2015 | 4.3L 6-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 20–23 | 295 | 5★ | 9 | 817 |
| 2014 | 4.3L 6-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 20–23 | 295 | 5★ | 9 | 859 |
| 2013 | 4.3L 6-cyl / 4.8L 8-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 17–20 | 325 | 4★ | 3 | 167 |
| 2012 | 4.3L 6-cyl / 4.8L 8-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 17–20 | 325 | 4★ | 3 | 152 |
| 2011 | 4.3L 6-cyl / 4.8L 8-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 17–20 | 325 | 4★ | 5 | 366 |
| 2010 | 4.3L 6-cyl / 4.8L 8-cyl / 5.3L 8-cyl / 6.2L 8-cyl | Regular Gasoline | 17–20 | 325 | — | 0 | 217 |
Best and Worst GMC Sierra K15 Years: What the NHTSA Data Shows
Across the 9 GMC Sierra K15 model years from 2010 to 2018 that have NHTSA data, the typical year has about 304 owner complaints on file. These are the extremes:
Fewest owner complaints
Complaint counts are unverified owner reports to NHTSA and rise with how many cars were sold and how long they have been on the road, so treat them as a pointer for what to inspect, not a reliability score. Model years after 2022 are left out because they have had little time to accumulate reports. Always check a specific car by VIN at nhtsa.gov/recalls.
Engine History
- 4.3L 6-cyl — 2010–2018
- 4.8L 8-cyl — 2010–2013
- 5.3L 8-cyl — 2010–2018
- 6.2L 8-cyl — 2010–2018
Engines are those EPA lists for each model year; the MPG (UK) column shows the range across configurations where more than one exists.
Compare the GMC Sierra K15 With Rivals
- Chevrolet Silverado C15 vs GMC Sierra K15
- Chevrolet Silverado K15 vs GMC Sierra K15
- GMC Sierra K15 vs Honda Ridgeline
- Chevrolet Silverado vs GMC Sierra K15
- GMC Sierra K15 vs Toyota Tundra
Frequently Asked Questions
What years is the GMC Sierra K15 covered on this site?
We have data for 9 model years of the GMC Sierra K15, from 2010 to 2018.
What engines does the GMC Sierra K15 come with?
EPA data lists: 4.3L 6-cyl (2010–2018); 4.8L 8-cyl (2010–2013); 5.3L 8-cyl (2010–2018); 6.2L 8-cyl (2010–2018).
Which GMC Sierra K15 year has the best fuel economy?
The 2018 model returns the highest combined MPG (UK) on record here, at 23 mpg on its most efficient configuration.
Does the GMC Sierra K15 have a 5-star NHTSA safety rating?
Yes — the 2014, 2015, 2016, 2017, 2018 model years hold an overall 5-star NHTSA rating on record here.
Which GMC Sierra K15 model years have the most recalls and complaints?
The 2014 model year has the most NHTSA recall campaigns on record (9), and the 2014 has the most owner complaints (859). NHTSA lists no recalls for 2010. Counts are from NHTSA as of 6 October 2026 and change over time; complaints are unverified owner reports.
What body style is the GMC Sierra K15?
The GMC Sierra K15 is classed as a pickup on this site.
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