The 2018 GMC Sierra lineup consists of one body style, three models, two types of wheel configurations, various trim levels, four powertrain options, two-wheel-drive or four-wheel drive, and various optional packages.
Available Body Styles
The 2018 GMC Sierra is available as a full-size pickup truck with several cab and box configurations.
Sierra 1500 Configurations
- Crew Cab, Short Box
- Crew Cab, Standard Box
- Double Cab, Standard Box
- Regular Cab, Standard Box
- Regular Cab, Long Box
Sierra 2500 Configurations (all with single rear wheel)
- Regular Cab, Long Box
- Double Cab, Standard Box
- Double Cab, Long Box
- Crew Cab, Standard Box
- Crew Cab, Long Box
Sierra 3500HD Configurations
- Regular Cab, Long Box, Single Rear Wheel
- Regular Cab, Long Box, Dual Rear Wheel
- Double Cab, Long Box, Single Rear Wheel
- Double Cab Long Box, Dual Rear Wheel
- Crew Cab, Standard Box, Single Rear Wheel
- Crew Cab, Long Box, Single Rear Wheel
- Crew Cab, Long Box, Dual Rear Wheel
- 3500HD Chassis Cab (CC)
Models
The 2018 GMC Sierra is available in seven model types.
- Sierra 1500
- Sierra 1500 Fleet
- Sierra 2500HD
- Sierra 2500HD Fleet
- Sierra 3500HD
- Sierra 3500HD Fleet
- Sierra 3500HD CC
Wheel Configurations
The 2018 GMC Sierra is available in two types of wheel configurations.
Sierra 1500
- Available exclusively in a four-wheel configuration
Silverado HD
- Four-wheel configuration
- Six-wheel configuration with dual rear wheels
Available Trim Levels
The 2018 GMC Sierra is available in 12 trim levels.
Sierra 1500
- Sierra (base, 1SA) in Regular, Double and Crew Cab
- SLEÂ (3SA) in Regular, Double and Crew Cab
- SLT (4SA) in Double and Crew Cab
- Denali (5SA) in Crew Cab only
Silverado 2500HD
- Sierra (base, 1SA)
- SLE (3SA)
- SLT (4SA)
- Denali (5SA) in Crew Cab only
Silverado 3500HD
- Sierra (base, 1SA)
- SLE (3SA)
- SLT (4SA)
- Denali (5SA) in Crew Cab only
Engines
The 2018 GMC Sierra is available with six engines.
Sierra 1500
- 4.3L V-6 LV3Â EcoTec3 engine (gasoline)
- 5.3L V-8 L83 EcoTec3 engine (gasoline)
- 5.3L V-8 eAssist LB3 mild hybrid (gasoline hybrid electric)
- 6.2L V-8 L86 EcoTec3 engine (gasoline)
Sierra HD
- 6.0L V-8 L96 Vortec engine (gasoline)
- 6.6L V-8 L5P Duramax engine (diesel)
Transmissions
The 2018 Sierra is available with five transmissions.
Sierra 1500
- Hydra-Matic 6-speed automatic MYC
- Hydra-Matic 8-speed automatic M5U
- Hydra-Matic 8-speed automatic eAssist M5X
Sierra HD
- Hydra-Matic 6-speed heavy-duty automatic MYD
- 6-speed Allison 1000Â automatic MW7
Drive Wheels
The 2018 GMC Sierra is available in two drive wheel configurations:
- Two-wheel-drive (rear-wheel-drive) – standard
- Four-wheel-drive (4WD) – optional
Packages
The 2018 GMC Sierra is available with various packages and options.
- This section coming soon
We will update this page once we learn more about the 2018 Sierra trim levels, lineup, and pricing.