What the GMC Yukon XL AT4 Adds Over the SLT in Houston
The Yukon XL AT4 adds standard four-wheel drive, an off-road-tuned suspension and skid plates over the street-focused SLT. Our Houston store sells the Yukon XL new, so you can see the trims in person.
Keep reading below, then schedule a test drive in Houston. Bringing your own numbers to the lot settles this faster than any spec sheet.
How much more does a Yukon XL AT4 cost than an SLT in Houston?
GMC lists the Yukon XL at a starting MSRP of $72,600. GMC states that figure for the Yukon XL nameplate, not for the AT4 or SLT trim, so ask us for each trim’s price on the unit you are looking at.
The gap is the number to take into your own comparison, because the sticker is only the start. Compare the AT4 and SLT on the same day, with the same financing terms, so the difference you see is the trim and not the paperwork.
How do towing and EPA fuel economy compare on the Yukon XL AT4 and SLT?
The EPA certification record for the 2026 Yukon XL lists several powertrains, and the ratings are the figures on the window sticker. The 4WD gasoline 5.3-liter Yukon XL is rated 14 city, 19 highway and 16 combined, and the 4WD 6.2-liter is rated 14 city, 18 highway and 16 combined. The 4WD diesel is rated 20 city, 24 highway and 22 combined, which is the best EPA combined figure in the 4WD Yukon XL group.
Read those ratings against the trim you plan to drive. Ask your advisor which engine is on the specific unit you are looking at, so the figure you use matches the vehicle in front of you.
Do you need the Yukon XL AT4, or is the SLT enough?
Choose the SLT if your driving stays on pavement.
Either way, the decision comes down to where you drive. Bring your route to the lot, and we will show you both trims on the same Yukon XL so you can see the difference for yourself.
Frequently asked questions
What are the EPA fuel economy ratings for the Yukon XL AT4 and the SLT?
The EPA lists ratings by powertrain and drive rather than by trim name. For 4WD gasoline, the 5.3-liter is rated 14 city, 19 highway and 16 combined, and the 6.2-liter is rated 14 city, 18 highway and 16 combined.
Why compare the Yukon XL at Group 1 Buick GMC North in Houston?
Group 1 Buick GMC North is at 11300 FM 1960 W, Houston, TX 77065. We sell new Yukon XL models, along with Acadia, Terrain, Canyon and Sierra models, so you can compare trims without leaving the lot. Our Google record is 4.4 stars across 7,919 reviews, and 79 in 100 of those reviews are five-star.
For financing, we offer a secure online finance application, and you can apply and get approved before you visit. Our sales hours are Monday to Saturday 8:00 AM to 8:00 PM, closed Sunday. Start with the Yukon XL inventory at Group 1 Buick GMC North, and bring your AT4 and SLT questions to the sales desk.
Group 1 Buick GMC North 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 Houston showroom, or call (281) 897-6690.
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 Group 1 Buick GMC North for complete details regarding current vehicle inventory, pricing, and equipment.
