23 MPG combined is a reasonable figure for the 2020 GMC Canyon 2WD with the 2.8L Duramax diesel. This isn’t a fuel-sipping commuter car, it’s a mid-size truck designed for owners who occasionally need to tow, haul, or venture onto unpaved roads, all while prioritizing a more refined experience than what’s offered by bare-bones work trucks. These owners accept the fuel economy as a trade-off for the Canyon’s blend of capability, comfort, and surprisingly upscale features.

City and highway performance

The EPA estimates the 2020 GMC Canyon diesel at 20 MPG in the city and a more respectable 30 MPG on the highway. The relatively low city MPG reflects the extra weight of the diesel engine and the demands placed on the automatic transmission to manage its narrower power band in stop-and-go traffic. The highway figure demonstrates the diesel’s strength, as it allows for relaxed cruising at lower RPMs, maximizing fuel efficiency. Many drivers find that gentle acceleration and anticipating traffic flow can significantly improve city MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 GMC Canyon 2WD diesel at $2,400. This figure is based on driving 15,000 miles per year, with 45% of those miles driven in the city and 55% on the highway, using national average fuel prices. Individual costs will vary depending on driving habits, local fuel prices, and the actual number of miles driven annually. However, $2,400 provides a benchmark for understanding the Canyon’s fuel expenses relative to other vehicles.

Real-world expectations

Official EPA numbers are a good guide, but real-world mileage can vary widely. Canyon owners who frequently tow or carry heavy loads will likely see numbers closer to the city estimate, or even lower. Conversely, those who primarily use the truck for highway commuting, particularly at consistent speeds, may achieve figures exceeding the EPA’s 30 MPG rating. Factors like tire pressure, vehicle maintenance, and even weather conditions can also influence fuel economy. Remember to consult owner forums and online communities for anecdotal data points from other Canyon diesel owners to fine-tune your expectations.

How it compares

The 2020 GMC Canyon 2WD diesel stands in a unique position within the mid-size truck segment. Its closest competitor, the Chevrolet Colorado with the same 2.8L Duramax diesel, offers nearly identical fuel economy figures. When compared to gasoline-powered competitors, the fuel story changes. For instance, the Toyota Tacoma 2WD with its 3.5L V6 achieves around 19 MPG combined, sacrificing fuel efficiency for a more traditional gasoline engine experience. The Nissan Frontier, another popular choice, achieves numbers in the same ballpark. Buyers considering the Canyon diesel are often prioritizing torque and towing capability alongside fuel economy, accepting that they might not achieve the absolute best MPG, but that the diesel engine uniquely suits their needs. Compare all Gmc fuel economy data to see how the Canyon stacks up against the rest of the brand.

Tips to maximize efficiency

Diesel engines, particularly those with turbochargers, respond well to smooth and gradual acceleration. Avoid aggressive starts and hard braking. Gently bring the engine up to speed to avoid unnecessary fuel consumption. The turbocharger needs to spool up, and aggressive throttle inputs before the turbo has a chance to respond will only waste fuel.

Tire pressure plays a bigger role than many realize. Check your Canyon’s tire pressure regularly and ensure it is inflated to the manufacturer’s recommended specification, which can be found on a sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel.

Remove any unnecessary weight from the truck bed or cab. Extra weight puts additional strain on the engine, decreasing fuel economy. If you regularly carry items that aren’t essential, consider storing them elsewhere. This is particularly relevant for owners who use their Canyons as everyday vehicles as well as for occasional hauling.

Service your Canyon according to the manufacturer’s recommended maintenance schedule. Regular oil changes, air filter replacements, and fuel filter replacements help the engine run efficiently. A well-maintained engine consumes less fuel and produces fewer emissions. Also consider using a diesel fuel additive, as clean injectors will optimize the truck’s performance and reduce emissions. Explore CANYON MPG across all years.

When possible, anticipate traffic flow and avoid unnecessary idling. Diesel engines are most efficient when they’re moving, and idling consumes fuel without covering any distance. If you anticipate being stopped for an extended period, consider turning off the engine, particularly in warmer weather.