The GMC Sierra 1500 is a full-size pickup built to tow, haul, and work, and full-size trucks come with a full-size fuel bill. If a Sierra is on your list, the honest question is what it costs to run: how much does a GMC Sierra 1500 cost in gas per year?
This is one of the thirstier vehicles in this series, simply because of its size, weight, and capability. But the right engine choice makes a real difference, and there is a diesel option worth knowing about. Here is the real annual cost.
How much does a GMC Sierra 1500 cost in gas per year?
Your annual fuel bill comes down to three things: how far you drive, what you pay per gallon, and the vehicle’s MPG. The GMC Sierra 1500 returns about 18 MPG combined, so here is what a year of driving costs at three common mileage levels, using the current national average of roughly $3.91 a gallon.
| Miles driven per year | Annual gas cost | Per month |
|---|---|---|
| 10,000 miles | $2,172 | $181 |
| 12,000 miles | $2,607 | $217 |
| 15,000 miles | $3,258 | $272 |
So the typical driver spends around $2,933 a year, or about $244 a month, on gas in a GMC Sierra 1500. That works out to roughly $0.22 per mile in fuel alone. Pay less than the national average where you live and the bill drops; at $3.50 a gallon the 13,500-mile figure falls to about $2,625, while at $4.50 it climbs to around $3,375. Check what you actually pay on the live gas price tracker and plug it into the gas cost calculator for a number matched to your driving.
Zoom out and the figure gets your attention. Over five years, a typical GMC Sierra 1500 driver spends roughly $14,663 on gas alone, and a decade of ownership close to double that. That is real money, which is exactly why fuel economy deserves a place in the buying decision alongside the sticker price and the monthly payment. A thriftier trim, or a hybrid version where one exists, quietly pays you back at every fill-up.
What kind of MPG does the GMC Sierra 1500 really get?
Recent GMC Sierra 1500 models vary a lot by engine. The turbocharged four-cylinder earns an EPA combined rating near 19 MPG, the 5.3-liter V8 lands around 17 to 18, and the 6.2-liter V8 a little lower. The standout is the Duramax turbo-diesel, which can reach the mid-20s combined. Call it roughly 18 MPG combined for the common gas engines, with four-wheel drive and towing pulling that down.
Keep in mind that the window-sticker number is a lab figure. Real-world mileage usually lands 10 to 15% lower, shaped by short trips, cold starts, aggressive acceleration, roof racks, and under-inflated tires. The honest way to know your GMC Sierra 1500’s number is to measure it: fill up, note the odometer, and run the math through the MPG calculator, then confirm the gallons any trip will use with the fuel consumption calculator.
Monthly, weekly, and per-mile cost
Big annual numbers are easy to ignore, so break them down. At the typical 13,500 miles a year, a GMC Sierra 1500 runs about $244 a month and roughly $56 a week in gas. On a per-mile basis that is about $0.22, but fuel is only part of what a mile really costs. Tires, oil, brakes, and depreciation stack on top, which is why the cost per mile calculator gives a truer picture of ownership. If most of your miles are a daily commute, the commute cost calculator shows exactly what that drive adds up to each month.
Here is a concrete example. A 30-mile round-trip commute five days a week comes to about 7,800 miles a year, which in a GMC Sierra 1500 means roughly $1,694 in commuting fuel alone, before you drive anywhere on the weekend. Small changes to that daily routine, carpooling twice a week, trimming one errand trip, or working from home a day, translate straight into fuel savings you can feel.
What changes your GMC Sierra 1500’s yearly fuel bill
Miles driven. This is the biggest lever by far. A 20,000-mile-a-year driver spends nearly double what a 10,000-mile driver does in the same vehicle, no matter how efficient it is.
Local gas prices. Where you live matters enormously. The same GMC Sierra 1500 costs hundreds more per year in high-price states like California than in cheaper states. Compare your state on the gas prices by state page to see where you fall.
City versus highway. The GMC Sierra 1500’s highway number beats its city number, so a driver stuck in stop-and-go traffic burns more than the combined rating suggests. Smooth, steady highway miles are the cheapest kind, and in dollar terms a mostly-city driver can spend a few hundred dollars a year more than a highway commuter in the very same vehicle.
Fuel grade. Good news here: the GMC Sierra 1500 is designed to run on regular unleaded, not premium, so you are already buying the cheapest grade at the pump. Cars that require premium can cost hundreds more a year, so sticking with regular where the manufacturer allows it is a saving many drivers overlook.
Driving style and upkeep. Hard acceleration, speeding, and a neglected air filter or soft tires all quietly raise the bill. Gentle inputs and basic maintenance protect the MPG you paid for.
How the GMC Sierra 1500 compares
Among full-size pickups, the Sierra is typical rather than an outlier, and its efficiency tracks closely with rivals from Ford and Ram. None of them are cheap to fuel, but the turbo four and especially the Duramax diesel give the Sierra some of the more economical options in the segment for buyers who prioritize running costs.
If you are curious whether an electric vehicle would be cheaper to run than the GMC Sierra 1500, the EV vs gas by state tool lays the two side by side using your local energy and fuel prices, which is the only fair way to compare.
How to cut your GMC Sierra 1500’s gas costs
- Consider the turbo four-cylinder or the Duramax diesel if efficiency matters more than maximum power.
- Remove heavy bed accessories and drop the tailgate myths aside; reducing weight and unnecessary towing saves fuel.
- Buy on cheaper days with our best day to buy gas guide and a gas price app.
- Avoid four-wheel drive on dry roads and keep tires properly inflated.
- Compare your state on the gas prices by state page, since fueling a truck magnifies price differences.
Does fuel economy matter when buying a GMC Sierra 1500?
More than most buyers realize. Two versions of the same vehicle with different MPG can differ by hundreds of dollars a year at the pump, and over a typical ownership period that gap can rival the price difference between trims or engines. When you compare a GMC Sierra 1500 against rivals, or one GMC Sierra 1500 engine against another, it pays to look past the monthly payment and fold the yearly fuel cost into the total. A slightly pricier but thriftier version often costs less to own once the gas is counted.
This is also where a hybrid, a smaller engine, or an efficient drivetrain earns its keep. Run the versions you are considering through the gas cost calculator side by side, and if you are open to going electric, the EV vs gas by state tool shows how charging would compare with fueling a GMC Sierra 1500 where you live.
So, is the GMC Sierra 1500 cheap to run?
Not by car standards, but that is the nature of a full-size truck. The Sierra is thirsty like its rivals, though choosing the turbo four or the Duramax diesel meaningfully lowers the bill. If you genuinely need the towing and hauling, the fuel cost is the price of that capability.
How we calculate these figures
The math is transparent: annual gas cost = (miles driven ÷ combined MPG) × price per gallon. We use the GMC Sierra 1500’s combined fuel-economy rating from the EPA’s official ratings for recent model years, an assumed 13,500 miles a year (close to the U.S. average), and the current national average pump price of about $3.91 a gallon. Change any input and the total changes with it.
Pump prices trace to the U.S. Energy Information Administration (EIA) weekly retail survey, refreshed on our state price pages every business day. For your exact trim, engine, and model year, confirm the EPA rating and measure your real-world MPG with the MPG calculator. Read how we source everything on our methodology and sources pages.
Figures reviewed by Alex Morgan · Last reviewed: July 12, 2026
Frequently Asked Questions
How much does a GMC Sierra 1500 cost in gas per year?
About $2,930 a year for a typical 13,500-mile driver at roughly 18 MPG and the national average near $3.91 a gallon. The turbo four and diesel cost less to run.
What is the GMC Sierra 1500’s MPG?
It varies by engine: near 19 MPG combined for the turbo four, about 17 to 18 for the 5.3-liter V8, and into the mid-20s for the Duramax diesel.
How much does a GMC Sierra 1500 cost in gas per month?
Roughly $244 a month for a typical driver with a gas V8, less with the turbo four or diesel.
Is the GMC Sierra 1500 good on gas?
It is typical for a full-size truck, meaning thirsty by car standards. The turbo four and Duramax diesel are the most economical choices.
Which Sierra engine is cheapest to run?
The turbocharged four-cylinder and the Duramax turbo-diesel are the most fuel-efficient, while the larger V8s cost the most to feed.
The bottom line
Expect a GMC Sierra 1500 to cost around $2,933 a year in gas for a typical driver, or about $244 a month, with your real number rising or falling on your mileage and local prices. On running costs, the GMC Sierra 1500 is thirsty, like most full-size trucks for its class, and a few simple habits shave even more off the total.
Want your exact figure? Run your mileage through the gas cost calculator and check today’s prices in your state. To see what fuel-saving habits are worth, try the fuel savings calculator.