How good is the GMC Yukon XL’s fuel economy for Oklahoma City families?

For an Oklahoma City family that needs a third row and room for gear, the GMC Yukon XL’s fuel economy is its EPA city, highway and combined rating for the engine and drive you pick. Those ratings are the figures to plan your yearly fuel cost around.

Bob Howard Buick GMC sells the Yukon XL at 13300 N Broadway Ext, Oklahoma City, OK 73114, so families in Oklahoma City, Edmond, Midwest City and Moore can start with the same published ratings.

Keep reading below, then schedule a test drive in Oklahoma City. Bringing your own numbers to the lot settles this faster than any spec sheet.

What are the GMC Yukon XL’s EPA mpg ratings by engine?

The Yukon XL carries its own EPA city, highway and combined rating for each engine and drive, and those are the ratings a family plans around. Across the 2026 lineup, combined ratings run from 16 mpg for the 6.2L V8 to 23 mpg for the 3.0L diesel in rear-wheel drive, which is the spread a buyer weighs first.

The EPA sets the test. Automakers run a representative vehicle through five defined cycles on a dynamometer, and the EPA independently confirms roughly 15% of those results (U.S. Environmental Protection Agency, 2026). Combined is not a simple average of the other two numbers. The federal rule at 40 CFR part 600, subpart D, builds it as a harmonic average of the city and highway values, weighted 0.55 and 0.45.

EPA ratings for the 2026 Yukon XL, by engine and drive:

The diesel tops every column in rear-wheel drive. Among the gasoline engines, the 5.3L V8 comes closest, at 17 mpg combined, one mpg above the 6.2L V8.

What would a Yukon XL cost in fuel each year in Oklahoma City?

Hypothetically, at 15,000 miles a year, a rear-wheel-drive 5.3L V8 costs about $3,132 in fuel in Oklahoma City. That figure comes from its EPA combined rating and AAA’s local gasoline price.

AAA’s Oklahoma City metro averages are $3.55 a gallon for regular gasoline and $5.58 for diesel (AAA, 2026). Hypothetically, at 17 mpg combined, 15,000 miles uses about 882 gallons of gasoline, or $3,132 at $3.55. The same miles in the 2WD diesel, rated 23 mpg, use about 652 gallons, or $3,639 at $5.58. The 6.2L V8, at 16 mpg, comes to about $3,328 in gasoline in the same hypothetical year.

Fuel is the part of the bill that moves with every trip, so miles matter as much as the engine.

Does the most efficient Yukon XL engine save money at Oklahoma City fuel prices?

Not automatically. At current Oklahoma City prices, the diesel doesn’t save money over the 5.3L V8, because diesel costs considerably more per gallon.

The diesel is the most efficient Yukon XL, at 23 mpg combined in rear-wheel drive, but that mileage does not cover its higher price per gallon. Hypothetically, at 15,000 miles a year, the diesel costs about $507 more in fuel than the 5.3L V8 in rear-wheel drive. Per mile, the diesel comes to about 24 cents and the 5.3L V8 about 21 cents.

Hypothetically, at $3.55 gasoline, the diesel would have to fall to about $4.80 a gallon to match the 5.3L V8 per mile. Diesel price is the number to watch, not the engine’s rating alone.

How much does four-wheel drive change the Yukon XL’s EPA rating?

Four-wheel drive lowers the combined rating by 1 mpg on the 5.3L V8 and on the diesel. On the 6.2L V8, the combined rating stays at 16 mpg in either drive.

The 5.3L V8 falls from 17 mpg to 16 mpg, and the diesel falls from 23 to 22. Hypothetically, that 1 mpg gap comes to about $196 a year at 15,000 miles and $3.55 gasoline.

The 6.2L V8 gives up its mpg in town and on the highway instead, dropping from 15 to 14 in the city and from 19 to 18 on the highway. A family that wants four-wheel drive for Oklahoma winters can choose the 6.2L V8 and keep the same combined rating, or accept the 1 mpg gap on the 5.3L V8 or the diesel.

What mpg, seating and cargo do the Yukon XL, Yukon and Acadia list?

The Yukon XL, Yukon and Acadia each carry published EPA ratings. Among the gasoline models in this lineup, the Acadia front-wheel-drive rating of 22 mpg combined is the highest, and only the Yukon XL diesel rates higher.

EPA ratings by model and drive:

GMC’s published 2027 Acadia specifications list 44.28 inches of row-one legroom and 97.51 cubic feet of cargo behind row one, 57.30 behind row two and 23.00 behind row three. Acadia Elevation seats up to 8 passengers, and the AT4, Denali and Denali Ultimate seat up to 7.

If fuel economy comes first, the Acadia front-wheel-drive model gives the best gasoline rating of these models.

How do your yearly miles change a Yukon XL’s fuel bill?

Fuel cost rises in a straight line with miles driven. Hypothetically, a rear-wheel-drive 5.3L V8 uses about 588 gallons at 10,000 miles a year and about 1,176 gallons at 20,000.

Every figure in this table is hypothetical, based on EPA combined ratings and AAA’s Oklahoma City prices.

Hypothetically, each extra 5,000 miles adds about $1,044 in gasoline for the 5.3L V8 and about $1,213 for the diesel. The diesel’s fuel gap over the 5.3L V8 grows from about $507 at 15,000 miles to about $676 at 20,000.

Frequently asked questions

What does a new GMC Yukon XL cost at Bob Howard Buick GMC?

The starting MSRP GMC lists for the 2026 Yukon XL is $72,600. Bob Howard Buick GMC sells new Buick and GMC models, including the Yukon XL, at 13300 N Broadway Ext, Oklahoma City, OK 73114.

What warranty comes with a new GMC Yukon XL?

GMC’s basic warranty on the 2026 Yukon XL is 3 years or 36,000 miles, whichever comes first. The powertrain warranty on a Yukon XL is typically 5 years or 60,000 miles, whichever comes first, and other durations are available.

Can I reserve a test drive of a Yukon XL in Oklahoma City?

Yes. Test drives can be reserved by contacting Bob Howard Buick GMC at 13300 N Broadway Ext, Oklahoma City, OK 73114. The sales team is in Monday to Saturday from 8:30 AM to 9:00 PM, with Sunday off.

Can I trade in my current SUV toward a Yukon XL?

Yes. The trade-in offer amount can be entered into the payment calculator, so you can see what the trade does to the payment.

Can I lease a new GMC Yukon XL instead of buying?

Yes. Bob Howard Buick GMC provides leasing on new Buick and GMC models as well as financing on new and pre-owned vehicles. A Yukon XL lease can be bought out at any point during the term.

Can I apply for Yukon XL financing before I visit?

Yes. You can fill out a secure finance application online ahead of your visit.

Where can Oklahoma City families see a new GMC Yukon XL at Bob Howard Buick GMC?

At 13300 N Broadway Ext, Oklahoma City, OK 73114, Bob Howard Buick GMC sells new Buick and GMC models, including the Yukon XL. Sales hours are Monday to Saturday, 8:30 AM to 9:00 PM. The service department keeps 7:00 AM to 7:00 PM, Monday to Saturday. We are closed Sunday.

We have 4.4 stars across 3,983 Google reviews (Google, 2026), and 79% of them are five-star. In an August 2026 Google review, Dana G. wrote: “Don did a terrific job in my purchase of my 2026 GMC Yukon. I felt he worked for and with me to make my purchase happen.” In a July 2026 Google review, Kailyn R. wrote: “We had a great experience at Bob Howard’s. Wayne our sales professional was very good and patient during our experience. We found the perfect vehicle. I couldn’t recommend them enough.”

Trade-in customers can visit with or without an appointment. Our online trade tool gives an instant offer on the trade-in, and that value is valid for seven days or up to 250 miles.

To start, reserve a test drive by contacting Bob Howard Buick GMC at 13300 N Broadway Ext, Oklahoma City, OK 73114, and bring your current SUV for a trade offer.

Bob Howard Buick GMC answers this question against the specific vehicle in front of you rather than the model in general. Value your trade and get pre-approved online, then see us at our Oklahoma City showroom, or call (405) 928-0697.

Disclaimer: Vehicle features, specifications, pricing, options, and availability may vary based on production timelines and dealership inventory; images are for illustrative purposes only. Starting MSRP figures are national and exclude destination freight charges, tax, title, license, and dealer fees. Standard and available equipment varies by trim, configuration, and model year; confirm the specification of the individual vehicle before purchase. Maximum towing and payload ratings depend on cab, bed, drivetrain, and equipment configuration; see the vehicle’s Owner’s Manual and trailering guide for limits. Electric range and charging times vary with battery, configuration, temperature, terrain, load, and driving habits. Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Financing and pre-approval are subject to credit approval. Contact Bob Howard Buick GMC for complete details regarding current vehicle inventory, pricing, and equipment.