Top Five Used GMC Trucks With Best MPG

Top 5 Used GMC Trucks That Are the Most Fuel-Efficient

Save at the Pump Without Sacrificing Professional-Grade Power

When searching for a used truck, fuel efficiency has shifted from a “luxury” feature to a financial necessity. For many drivers, the right pickup isn’t just about how much it can haul, but how much it costs to keep on the road. High fuel economy directly impacts your long-term ownership costs, making your daily commute or job site runs significantly more affordable.

While trucks are built for utility, several main factors influence their efficiency: MPG ratings, engine type (such as diesel vs. gas), transmission gears, and the drivetrain (2WD vs. 4WD). GMC has earned an amazing reputation for balancing these needs, utilizing fuel-conscious engineering to provide power and reliability without the typical gas-guzzler tax.

Here are the five top used GMC trucks that offer the best gas mileage at Vision Buick GMC.

1. GMC Sierra 1500 (3.0L Duramax Turbo-Diesel)

The full-size leader in efficiency is without a doubt the Sierra 1500 equipped with the 3.0L Duramax Turbo-Diesel engine. Often paired with a smooth 10-speed automatic transmission, this configuration is a highway superstar.

• Engine Specs: 277–305 HP / 460–495 lb-ft of Torque
• Fuel Economy: Up to 23 City / 30 Highway MPG (2WD models)

This model proves you don’t have to choose a small vehicle to get high-tier fuel economy; it is the ultimate long-haul companion.

2. GMC Canyon (2.8L Duramax Diesel)

For those who prefer a midsize frame, a used GMC Canyon with the 2.8L Duramax Diesel is a rare find that delivers exceptional features and maneuverability.

• Engine Specs: 181 HP / 369 lb-ft of Torque
• Fuel Economy: Up to 20 City / 30 Highway MPG

It offers the perfect balance for urban driving and weekend adventures while maintaining segment-leading MPG.

3. GMC Sierra 1500 (2.7L TurboMax)

If you prefer gasoline over diesel, look for a recent-model Sierra with the 2.7L TurboMax High-Output engine. This four-cylinder powerhouse uses a dual-volute turbocharger to provide V8-like torque with much better efficiency.

• Engine Specs: 310 HP / 430 lb-ft of Torque
• Fuel Economy: Up to 19 City / 22 Highway MPG

It is the perfect choice for light towing and daily commuting where responsive power is a priority.

4. GMC Canyon AT4 (Off-Road Capable)

Need to go off-road without draining your bank account? The Canyon AT4 offers 4WD capability and rugged tires while staying efficient thanks to its optimized powertrain.

• Engine Specs: 3.6L V6 (or 2.7L Turbo in newer years)
• Fuel Economy: Approximately 17 City / 21 Highway MPG

It appeals to buyers who need a versatile 4×4 but want to avoid the “gas-guzzler” reputation of larger off-road rigs.

5. Older GMC Canyon (2.5L 4-Cylinder)

For the budget-conscious shopper, an earlier-model GMC Canyon (2015–2020) with the 2.5L I4 engine is a smart choice. It focuses on affordability and proven reliability.

• Engine Specs: 200 HP / 191 lb-ft of Torque
• Fuel Economy: Up to 19 City / 25 Highway MPG

This is the best value-focused option for those who need a truck bed for home projects but want to keep their monthly fuel bill as low as possible.

Why GMC Trucks Excel in Fuel Efficiency

GMC trucks excel because they don’t just “downsize”—they optimize. Through the use of advanced transmissions and turbocharged technology, GMC offers a more balanced performance than many competitors. These models represent a smart used-truck investment because they retain their value while saving you money at every fill-up.