The 2024 GMC Sierra 4WD with mud-terrain tires and the 2.7L turbocharged four-cylinder gets 16 MPG combined. This is not a surprising number, nor is it likely to deter the buyer this truck is designed for. This Sierra configuration is built for capability, not fuel efficiency. It’s for the buyer who prioritizes off-road ability, rugged looks, and the utility of a pickup truck, even if it means stopping at the pump more often. They need a workhorse that can handle tough jobs and challenging terrain, and they’re willing to accept the fuel consumption that comes with it.

City and highway performance

The EPA estimates that the 2024 GMC Sierra with this specific configuration achieves 16 MPG in the city and 17 MPG on the highway. While these numbers might seem low compared to other vehicles, it’s important to remember the Sierra’s purpose. The mud-terrain tires, aggressive tread pattern, and four-wheel-drive system all increase rolling resistance and drivetrain losses, which directly affects fuel economy. It is designed to tackle loose rocks, deep mud, and unpaved trails. This isn’t a commuter car disguised as a truck, it’s a truck built to do truck things and SIERRA MPG across all years will vary depending on the year and configuration.

Annual fuel cost

The EPA estimates that the annual fuel cost for this Sierra configuration is $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. The actual cost will vary depending on individual driving habits, local fuel prices, and the type of driving (more off-road use will decrease fuel economy). However, this figure provides a standardized benchmark for comparing the fuel costs of different vehicles. It’s a hard number to swallow, but it’s the price to pay for the capabilities this truck offers.

Real-world expectations

While the EPA estimates offer a baseline, real-world fuel economy often differs. It is possible to achieve slightly better mileage on long highway trips if you maintain a constant speed and avoid aggressive acceleration. However, expect the combined MPG to hover around the EPA estimate, especially with frequent city driving or any off-road use. Cold weather can also negatively impact fuel economy, and so can carrying heavy loads or towing. The bottom line: Manage your expectations, and understand the trade-offs.

How it compares

To put these numbers in perspective, consider some competitors. A comparable 2024 Toyota Tacoma TRD Off-Road with four-wheel drive and its V6 engine gets around 18 MPG combined. A Ford Ranger with four-wheel drive and the EcoBoost engine is rated a bit higher, at around 22 MPG combined. Even within the GMC family, other Sierra configurations offer better fuel economy. An equivalent 2024 Sierra with a more street-oriented tire and without the dedicated off-road package could see closer to 18-19 MPG combined with the same engine, and all Gmc fuel economy data can be found on our site.

Tips to maximize efficiency

Maintaining proper tire pressure is critical, especially with mud-terrain tires. These tires are designed for off-road grip, not low rolling resistance. Keeping them inflated to the recommended pressure (typically found on the driver’s side doorjamb) will minimize rolling resistance on paved roads, improving fuel economy by a small but measurable amount.

Avoid aggressive acceleration and hard braking. The 2.7L turbo engine is designed for low-end torque, so there’s no need to constantly push it to its limits. Gradual acceleration and smooth braking techniques will reduce fuel consumption.

Minimize idling. Modern engines don’t need to be warmed up for extended periods before driving. Idling consumes fuel without covering any distance. Turn off the engine if you’re stopped for more than a minute or two.

Consider removing unnecessary weight from the truck bed. Hauling around extra weight will reduce fuel economy. If you’re not using the bed for hauling, keep it empty to minimize the load on the engine.