Gmc · model year 2018
2018 Gmc Sierra
Specifications and certified data for the 2018 model year. All Gmc Sierra model years →
2018 US EPA fuel-economy records
| Year | Engine | Drive | Transmission | Fuel | MPG (US) comb. | CO₂ g/mi | EV range mi | Source |
|---|---|---|---|---|---|---|---|---|
| 2018 | 4.3 L 6-cyl | Rear-Wheel Drive | Automatic 6-spd | Gasoline or E85 | 20 | 448 | — | EPA ↗ |
| 2018 | 4.3 L 6-cyl | 4-Wheel Drive | Automatic 6-spd | Gasoline or E85 | 19 | 474 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | Rear-Wheel Drive | Automatic 8-spd | Regular | 20 | 447 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | 4-Wheel Drive | Automatic 8-spd | Regular | 18 | 490 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | Rear-Wheel Drive | Automatic 8-spd | Regular | 18 | 495 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | Rear-Wheel Drive | Automatic 6-spd | Regular | 19 | 475 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | Rear-Wheel Drive | Automatic 6-spd | Gasoline or E85 | 19 | 475 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | 4-Wheel Drive | Automatic 8-spd | Regular | 17 | 522 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | Rear-Wheel Drive | Automatic 6-spd | Regular | 17 | 523 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | 4-Wheel Drive | Automatic 6-spd | Regular | 17 | 523 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | 4-Wheel Drive | Automatic 6-spd | Regular | 18 | 489 | — | EPA ↗ |
| 2018 | 5.3 L 8-cyl | 4-Wheel Drive | Automatic 6-spd | Gasoline or E85 | 18 | 489 | — | EPA ↗ |
| 2018 | 6.2 L 8-cyl | Rear-Wheel Drive | Automatic 8-spd | Premium | 17 | 517 | — | EPA ↗ |
| 2018 | 6.2 L 8-cyl | 4-Wheel Drive | Automatic 8-spd | Premium | 17 | 524 | — | EPA ↗ |
US EPA test figures (US MPG, US test cycle), fueleconomy.gov ↗, US government public domain.
US safety recalls
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26V325000 2026-05-21 · model years 2018, 2019
AIR BAGS
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles. The left-side or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.
Remedy: Dealers will replace both RRAB modules, free of charge. Owner notification letters were mailed June 24, 2026. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at 1-800-222-1020.…
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26V166000 2026-03-19 · model years 2018, 2019
AIR BAGS
General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 Crew Cab vehicles. The left or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may…
Remedy: Dealers will replace the left and right-side RRAB modules, free of charge. Owner notification letters were mailed April 16, 2026. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service…
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25V432000 2025-06-26 · model years 2018, 2019
AIR BAGS
General Motors (GM) is recalling certain 2018 GMC Sierra 1500, 2019 Sierra 2500, 3500, Chevrolet Silverado 3500, and Chevrolet Silverado 2500 and 2018 Chevrolet Silverado 1500 Crew Cab vehicles. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may…
Remedy: Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed July 23, 2025. Owners may contact GMC customer service at 1-888-988-7267 or Chevrolet customer service at…
NHTSA recalls database (US government, public domain). Recalls apply to US-market vehicles; check the manufacturer for your country.
Generation in 2018
Sources
- US EPA / DOE FuelEconomy.gov — https://www.fueleconomy.gov/feg/ws/index.shtmlUS Government public domain
- NHTSA recalls database — https://www.nhtsa.gov/recallsUS Government public domain
- Car Model Index — https://models.autoculturesociety.com/Compiled record. Sources that do not permit reuse are not copied; this index is credited instead.