2010 GMC Sierra K15 — Full Specifications
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The 2010 GMC Sierra K15 is a pickup offered with 4 engines (4.3L 6-cyl, 4.8L 8-cyl, 5.3L 8-cyl). Its most fuel-efficient configuration returns around 20 mpg (UK) / 17 mpg (US EPA) combined, with 17–20 mpg (UK) across all configurations. Owners often keep a GMC Sierra K15 workshop manual to hand for servicing and repairs.
Related listing: see also the 2010 GMC Sierra page for the base Sierra listing, which may cover additional engines and body styles.
Full Specifications
| Engine (most efficient) | 5.3L 8-cyl |
|---|---|
| Engine options | 4.3L 6-cyl · 4.8L 8-cyl · 5.3L 8-cyl · 6.2L 8-cyl |
| Transmission (most efficient) | Automatic 6-spd |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | 4-Wheel Drive |
| Body Style | Pickup |
| Fuel Economy (UK) | 20 combined / 18 urban / 25 extra-urban mpg |
| Fuel Economy (US EPA) | 17 combined / 15 city / 21 highway mpg |
| CO₂ Emissions | 325 g/km |
| EPA Est. Annual Fuel Cost | $3,950 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 5 configurations for the 2010 GMC Sierra K15 across 4 engines (4.3L 6-cyl, 4.8L 8-cyl, 5.3L 8-cyl, 6.2L 8-cyl). Combined fuel economy ranges from 14 to 17 mpg (US), or 17 to 20 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 4.3L 6-cyl | Automatic 4-spd | 4-Wheel Drive | 18 | 15 (14/18) | 368 | $4,450 |
| 4.8L 8-cyl | Automatic 4-spd | 4-Wheel Drive | 18 | 15 (13/18) | 368 | $4,450 |
| 5.3L 8-cyl | Automatic 6-spd | 4-Wheel Drive | 20 | 17 (15/21) | 325 | $3,950 |
| 6.2L 8-cyl | Automatic 6-spd | 4-Wheel Drive | 17 | 14 (12/19) | 394 | $4,800 |
| 6.2L 8-cyl | Automatic 6-spd | All-Wheel Drive | 17 | 14 (12/19) | 394 | $4,800 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2010 GMC Sierra K15
Running Costs: 2010 GMC Sierra K15
Covering around 8,000 miles a year in a 2010 GMC Sierra K15 at 20 mpg combined, expect roughly 1,818 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,950 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2010 GMC Sierra K15 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2010 GMC Sierra K15 as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 217 complaints with NHTSA about the 2010 GMC Sierra K15. The most-reported areas are Air bags (88), Unspecified (60), Structure (46). Complaints include 5 reported crashes, 4 reported fires, 14 reported injuries. That is close to the median of 304 complaints across the 9 GMC Sierra K15 model years in our data.
Used-buyer checklist for the 2010 GMC Sierra K15
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Air bags (88 owner complaints) — Confirm any air bag inflator or module recalls were completed — enter the VIN at nhtsa.gov/recalls.
- Body structure (46 owner complaints) — Inspect for corrosion and for subframe or body-panel damage, especially underneath.
- Electrical system (14 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the GMC Sierra K15 compare to similar pickups? For context, pickups in our database average around 25 mpg (UK) combined — this model's 20 mpg figure is 5 mpg below that average. Its 325 g/km CO₂ figure is 42 g/km higher than the 283 g/km average for pickups on this site. This comparison is based on 264 pickups in our dataset.
GMC models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2010 GMC Sierra K15's 20 mpg is 6 mpg below that make average. Its 325 g/km CO₂ figure is 53 g/km higher than the 272 g/km GMC average.
Of the 9 GMC Sierra K15 model years we cover, the 2010 ranks 6th for combined fuel economy on its best configuration (20 mpg UK combined, against a high of 23 mpg). See every GMC Sierra K15 year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2010 GMC Sierra K15
Frequently Asked Questions
What engine does the 2010 GMC Sierra K15 have?
EPA lists 4 engines for the 2010 GMC Sierra K15: 4.3L 6-cyl, 4.8L 8-cyl, 5.3L 8-cyl, 6.2L 8-cyl. The most fuel-efficient configuration pairs the 5.3L 8-cyl with a automatic 6-spd.
What is the fuel economy of the 2010 GMC Sierra K15?
The most efficient configuration returns around 20 mpg (UK) combined, or 17 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 17 to 20 mpg.
How much does the 2010 GMC Sierra K15 cost to fuel per year?
The US EPA estimates about $3,950 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2010 GMC Sierra K15 have any recalls?
NHTSA lists no safety recall campaigns for the 2010 GMC Sierra K15 as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2010 GMC Sierra K15?
Among the 217 owner complaints filed with NHTSA, the most-reported areas are Air bags (88 complaints), Unspecified (60 complaints), Structure (46 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the GMC Sierra K15's fuel economy good for a pickup?
It returns around 20 mpg (UK) combined, against a same-body-style average of roughly 25 mpg among the pickups we track.