Before buying a used 2018 GMC Sierra, check whether recall repairs were completed, how it scored in crash tests and what owners report most often. Ask the seller for service records covering any recall listed below.
A 0–100 grade from public NHTSA data — higher means fewer reported problems. How it's calculated
NHTSA hasn't published 5-star ratings for this model year.
Source: NHTSA New Car Assessment Program.
No owner complaints have been filed with NHTSA for this model year.
Source: NHTSA owner complaints. Complaints are unverified reports, not confirmed defects.
| Version | City | Highway | Combined |
|---|---|---|---|
| Sierra 15 Hybrid 2WD — Auto 8-spd, 8 cyl, 5.3 L | 13.1 L/100 km (18 mpg) | 9.8 L/100 km (24 mpg) | 11.8 L/100 km (20 mpg) |
| Sierra 15 Hybrid 4WD — Auto 8-spd, 8 cyl, 5.3 L | 14.7 L/100 km (16 mpg) | 11.2 L/100 km (21 mpg) | 13.1 L/100 km (18 mpg) |
| Sierra C15 2WD — Auto 6-spd, 6 cyl, 4.3 L, SIDI; FFV | 13.1 L/100 km (18 mpg) | 9.8 L/100 km (24 mpg) | 11.8 L/100 km (20 mpg) |
| Sierra C15 2WD — Auto 6-spd, 8 cyl, 5.3 L, SIDI | 14.7 L/100 km (16 mpg) | 10.2 L/100 km (23 mpg) | 12.4 L/100 km (19 mpg) |
| Sierra C15 2WD — Auto 6-spd, 8 cyl, 5.3 L, SIDI; FFV | 14.7 L/100 km (16 mpg) | 10.2 L/100 km (23 mpg) | 12.4 L/100 km (19 mpg) |
| Sierra C15 2WD — Auto 8-spd, 8 cyl, 5.3 L, SIDI | 14.7 L/100 km (16 mpg) | 10.7 L/100 km (22 mpg) | 13.1 L/100 km (18 mpg) |
Source: U.S. EPA / fueleconomy.gov. Converted to L/100 km for Canadian buyers.
No NHTSA recalls are on file for the 2018 GMC Sierra.
Source: U.S. NHTSA. Canadian-market vehicles can have different recalls — check Transport Canada's recall database. Always confirm recall status for a specific VIN with a dealer.
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