18 MPG combined isn’t going to win any awards, but it’s a figure the 2017 GMC Sierra 1500 Hybrid 4WD 5.3L 8-cyl buyer likely already understands. This is a truck for work, for towing, and for navigating unpredictable conditions. Efficiency is appreciated, of course, but capability is the priority. The hybrid system aims to offer fuel savings without compromising the Sierra’s core mission as a dependable and rugged workhorse.

City and highway performance

The EPA estimates this particular Sierra configuration achieves 16 MPG in the city and 21 MPG on the highway. That difference reflects the hybrid system’s effectiveness at recuperating energy during stop-and-go driving.

The electric motor provides assistance during acceleration from a standstill, reducing the engine’s workload and fuel consumption in city environments. On the highway, where the engine is consistently engaged, the benefits are less pronounced. However, cylinder deactivation technology kicks in to further optimize efficiency during cruising, shutting down cylinders to reduce fuel consumption when full power isn’t demanded. To better use the hybrid system’s strengths, understanding these nuances of city and highway performance will help owners adjust their driving habits.

Annual fuel cost

The EPA estimates the annual fuel cost for this 2017 GMC Sierra 1500 Hybrid to be $2,450. This figure is calculated based on driving 15,000 miles per year and using the national average fuel price. Of course, fuel prices fluctuate regionally and daily, and individual driving habits play a significant role.

Someone who primarily drives on the highway will likely spend less than $2,450 annually, while a driver frequently stuck in gridlock could easily exceed that amount. Consider this EPA figure a baseline for average driving conditions and current fuel prices; your personal costs will vary.

Real-world expectations

While the EPA figures offer a standardized benchmark, real-world fuel economy can differ significantly. Factors such as driving style, terrain, load, and weather conditions all contribute to variations in MPG.

Drivers who frequently tow heavy loads or drive aggressively can expect lower fuel economy. Likewise, cold weather can negatively impact fuel economy as the engine takes longer to reach optimal operating temperature. Some owners report similar values, while others claim highway numbers closer to 18-19 MPG. This underscores the importance of regular maintenance and adopting fuel-efficient driving practices to closing the gap between the EPA estimate and real-world observations.

How it compares

Compared to non-hybrid, similarly equipped 2017 GMC Sierra 1500 models with the same 5.3L V8, the hybrid offers a modest improvement in fuel economy. Standard 4WD Sierras with the 5.3L V8 typically average around 15 MPG combined.

The Ford F-150 equipped with the 2.7L EcoBoost engine performs better, approaching 20 MPG combined in 4×4 configuration. The F-150 prioritizes fuel efficiency in its design to a greater extent than the GMC Sierra, which maintains higher levels of reliability and towing capacity in some configurations. For buyers prioritizing strength over less gas, it also lags behind trucks with bigger engines like the 6.2L V8 Sierra which comes in around 17 MPG on the highway.

Tips to maximize efficiency

Take advantage of the Sierra’s regenerative braking system by anticipating stops and easing off the accelerator early. This allows the electric motor to recover energy and recharge the battery, reducing the need for conventional braking and maximizing fuel efficiency, especially in city driving.

Try to avoid hard acceleration, as the Sierra’s 5.3L V8 demands more fuel when it’s pushed.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate your tires to the recommended pressure listed on the door jamb. Doing so benefits both fuel economy and tire longevity.

Reduce aerodynamic drag by removing unnecessary items from the truck bed and avoiding roof racks when not needed. These accessories create additional drag, which increases fuel consumption, especially in highway driving. Also, minimize idling. If you’re stopped for more than a minute and it’s safe to do so, turn off the engine, as idling consumes fuel without moving the vehicle.

Ensure your Sierra’s engine is properly maintained with regular oil changes and tune-ups. A well-maintained engine operates more efficiently, reducing fuel consumption and maximizing performance. This includes using the correct type of motor oil and ensuring all filters are clean.

To find all Gmc fuel economy data, feel free to browse this website. Also, you can explore SIERRA MPG across all years on our site.