What does the GMC Sierra 1500 AT4 add for Oklahoma City drivers?
The GMC Sierra 1500 AT4 adds factory off-road hardware, traction and underbody protection, and a more fully equipped cabin to the Sierra 1500, which suits Oklahoma City drivers who leave pavement, tow or haul. Bob Howard Buick GMC in Oklahoma City sells the Sierra 1500. The AT4 earns its place off the pavement, on gravel roads, job sites and trailer trips.
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.
The GMC Sierra 1500 AT4 adds off-road hardware Oklahoma City drivers can use
The AT4 is the Sierra 1500’s off-road trim. It adds suspension, traction and underbody equipment that the maker lists as standard, plus a cabin with heated and ventilated front seats.
GMC’s standard list puts a 2-inch factory lift, off-road suspension and Rancho monotube shocks under the AT4. The truck also comes with a two-speed Autotrac transfer case and underbody skid plates. Those parts matter when the road turns to gravel, a ranch track or a muddy job site. The interior comes in Jet Black with Kalahari accents, and the front leather seating surfaces are heated and ventilated. Bob Howard Buick GMC sells new Sierra 1500 trucks on Broadway Extension.
What off-road equipment comes standard on the GMC Sierra 1500 AT4?
The AT4 comes standard with a 2-inch factory lift, off-road suspension with Rancho monotube shocks, a two-speed Autotrac transfer case and underbody skid plates. Those four items come from the maker’s standard equipment list for the trim.
The lift raises the truck for uneven ground and rough tracks. The two-speed Autotrac transfer case is the traction hardware under the truck. The skid plates protect the underside of the truck from rocks and ruts. Because these items come standard, an Oklahoma City buyer who drives off pavement does not need to add them after the sale.
What Oklahoma City driving gets the most from the GMC Sierra 1500 AT4?
The AT4 suits Oklahoma City drivers who leave the pavement.
Daily commuting is a different test. Oklahoma City workers average 22.2 minutes to get to work (US Census Bureau QuickFacts, 2020-2024 ACS five year estimates), so the off-road equipment earns its keep on weekends, job sites and rural trips more than on the commute.
Winter and summer both push the truck’s comfort features. The normal January low is 27.0 degrees, and the city averages 72.2 days a year at or below 32 degrees (NOAA National Centers for Environmental Information, 1991-2020 climate normals).
What cabin comfort does the GMC Sierra 1500 AT4 add for Oklahoma weather?
The AT4 has heated and ventilated front seats, and the maker lists them as standard. Ventilated seats matter most in Oklahoma summers, when the city averages 73.4 days a year at or above 90 degrees (NOAA National Centers for Environmental Information, 1991-2020 climate normals).
The cold mornings that come with that January low make the heated seats the useful half of the pair. The same summer heat that the driving section covers is the reason the ventilation matters. The front seating surfaces are perforated leather, set in a Jet Black interior with Kalahari accents.
What tech and truck-bed features does the GMC Sierra 1500 AT4 carry?
The 15-inch diagonal multicolor Head-Up Display is among the AT4’s available features, so buyers choose it as an option. The Sierra 1500 line lists maximum cargo of 62.9 cubic feet for the short bed and 71.7 for the standard bed.
The Head-Up Display projects driving information onto the windshield, so the driver keeps eyes on the road. The bed figures cover the whole Sierra 1500 line, not the AT4 alone, so they apply to a short-bed or standard-bed truck of any trim.
What engines, towing and payload does the GMC Sierra 1500 AT4 offer?
The AT4 lists the 3.0L Duramax Turbo-Diesel with a 10-speed automatic as standard equipment. The 6.2L V8 is among its available features, and the maker lists up to 420 horsepower, the maximum available on Crew Cab 4WD models.
GMC’s trailering charts give towing by drivetrain, cab, bed and drive setup, so the number depends on how the truck is built. An Oklahoma City buyer who tows should match the engine and drive setup to the trailer before choosing a trim.
Sierra 1500 trims for Oklahoma City buyers by price, engine and off-road gear
The AT4 starts at $67,000 and lists the Duramax 3.0L Turbo-Diesel as standard. The AT4X starts at $79,600 and carries the 6.2L V8 in its EPA certified record.
| Trim | Starting MSRP | Engine |
|---|---|---|
| Sierra 1500 AT4 | $67,000 | Duramax 3.0L Turbo-Diesel as standard; 6.2L V8 available |
| Sierra 1500 AT4X | $79,600 | 6.2L V8 |
The price gap between the two trims is the first number to weigh. For an Oklahoma City buyer, the AT4’s standard off-road hardware and heated and ventilated seats are what to weigh against that price.
Frequently asked questions
What warranty comes with a new GMC Sierra 1500 AT4?
GMC’s published warranty terms give the basic warranty as 3 years or 36,000 miles, whichever comes first. The powertrain warranty is typically 5 years or 60,000 miles, whichever comes first, but other durations are available.
What fuel economy does the GMC Sierra 1500 AT4 get?
The EPA certifies the 2026 Sierra 1500 4WD diesel with Sport Mode, which uses the 3.0L Duramax, at 22 mpg city, 26 highway and 24 combined.
What options and packages can you add to the GMC Sierra 1500 AT4?
The 6.2L V8 and the 15-inch diagonal multicolor Head-Up Display are listed as available features on the AT4, so they are not standard. GMC’s published starting price for the AT4 is $67,000.
What cab and bed sizes does the GMC Sierra 1500 AT4 come in?
GMC’s AT4 figures are for the Crew Cab 4WD, which seats up to 5. GMC lists a short bed and a standard bed across the Sierra 1500 line.
How Bob Howard Buick GMC lays out each Sierra 1500 price online
The AT4 pays off where the pavement stops, so the next step is to see the truck on a listing and drive it. We sell new Sierra 1500 trucks on Broadway Extension, and new listings show MSRP, dealer discount, documentation fee and sale price for each stock unit. Test drives can be reserved online or by contacting the store.
Bob Howard Buick GMC holds a 4.4-star Google rating across 3,983 reviews, and 79 in 100 of them are five-star. 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.”
Bob Howard Buick GMC is where Oklahoma City buyers who need factory off-road hardware for gravel, job sites and trailer trips can start with the Sierra 1500 on Broadway Extension. Reserve a test drive online or contact the store to get started.
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.
