The 2019 GMC Sierra C10 Cab Chassis 2WD with the 5.3L V8 gets 16 MPG combined. This MPG figure isn’t aimed at the fuel-conscious commuter. This Sierra configuration exists to provide a reliable platform for upfitting into work trucks. These include landscaping companies, construction crews, and contractors who prioritize capability and longevity over fuel sipping. For these buyers, the C10’s low upfront cost, proven powertrain, and customization potential outweigh concerns about frequent trips to the gas station. They accept the compromise.

City and highway performance

The EPA breaks down that 16 MPG combined figure into 14 MPG in the city and 19 MPG on the highway. The city figure reflects the stop-and-go conditions typical of urban work environments, where idling and low-speed maneuvering take a toll. The highway MPG shows that the Sierra C10, when unloaded and cruising at steady speeds, can achieve reasonable efficiency for its size and engine. However, that 19 MPG number will quickly shrink when towing or hauling heavy loads, as it often does. It’s important to remember that these are unladen figures, and the additional weight significantly affects fuel consumption.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 GMC Sierra C10 Cab Chassis 2WD at $2,750. This calculation is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway. The calculation also uses the national average fuel prices at the time of estimation. Keep in mind that your actual fuel costs may vary depending on your driving habits, the type of work you do, and local fuel prices. For fleet managers, understanding this figure is crucial for budgeting and assessing the overall cost of ownership beyond the initial purchase price.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy for the Sierra C10 can fluctuate substantially. Factors such as load weight, driving style, terrain, and even tire pressure all play a significant role. A heavy right foot will decimate fuel efficiency, as will regularly towing near the vehicle’s maximum capacity. Conversely, careful driving, consistent maintenance, and proper tire inflation can help you stay closer to the EPA estimates. Consider that, as this is a Cab Chassis, the upfit installed by a second party can affect aerodynamics and weight, thereby affecting MPG.

How it compares

Compared to other full-size trucks, the 2019 GMC Sierra C10’s fuel economy is not class-leading. A comparable Ford F-150 XL with the 2.7L EcoBoost V6 achieves an EPA-estimated 20 MPG combined, emphasizing the efficiency gains of smaller turbocharged engines. Ram’s 1500 Tradesman with the eTorque 3.6L V6 can reach a similar 20 MPG combined. For the buyer considering only fuel economy, these alternatives may seem appealing. However, the Sierra C10’s enduring appeal lies in its simplicity, its traditional V8 power delivery, and its compatibility with a wide range of upfitting solutions. It’s why savvy professionals often choose this truck over its more fuel-efficient rivals even with the current all Gmc fuel economy data.

Tips to maximize efficiency

Minimize idling time. The Sierra C10’s 5.3L V8 consumes a significant amount of fuel when idling. If you’re on a job site and stopping for extended periods, turn off the engine. Excessive idling wastes fuel and contributes to premature engine wear.

Drive smoothly and anticipate traffic. Avoid sudden acceleration and hard braking, as they waste fuel. Maintaining a more consistent speed and anticipating traffic flow helps improve fuel efficiency, especially on the highway. The Sierra chassis is prone to bouncy on/off-throttle inputs, practice smooth driving to counter this tendency.

Maintain proper maintenance and tire inflation. Regular maintenance, including oil changes, air filter replacements, and spark plug checks, can positively impact fuel economy. Also, ensure tires are inflated to the proper pressure. Underinflated tires increase rolling resistance, decreasing fuel efficiency. This is incredibly important for a work truck that is used everyday.

Lighten the load whenever possible. While the Sierra C10 is designed for heavy-duty work, carrying unnecessary weight reduces fuel economy. Remove any unnecessary tools or equipment when they aren’t needed. Consider that every extra pound impacts SIERRA MPG across all years.

Avoid aggressive driving. While the 5.3L V8 offers ample power, using it sparingly benefits fuel economy. Avoid accelerating rapidly and maintain a reasonable speed. Aggressive driving wastes fuel and can be less safe. This is especially true when the truck is loaded with equipment and materials.