2020 GMC SIERRA 1500 CREW CAB

If you're searching for a capable, off-road-ready truck that's ready for both the job site and the backcountry, this 2020 GMC Sierra 1500 AT4 Crew Cab for sale at Own a Car Yakima in Yakima, WA is worth a serious look. Priced at $33,999 and wearing a sharp Gray exterior, this 4WD pickup combines GMC's premium build quality with the rugged AT4 off-road package — all at a price point well below what you'd pay for a new one off the lot.

About This 2020 GMC Sierra 1500 AT4

At 111,516 miles, this Sierra 1500 AT4 sits in a sweet spot for used truck buyers in Yakima County. That mileage is well within the normal working range for a half-ton GM truck with a properly maintained 5.3L V8 — these engines routinely run 200,000+ miles with regular oil changes. The AT4 trim sits above the SLT and just below the Denali in GMC's lineup, meaning you're getting a fully loaded, off-road-tuned truck without paying top-dollar Denali prices. The Gray exterior is clean and practical — it hides trail dust and job site grime better than most colors, which is exactly what you want in a working truck.

2020 GMC Sierra 1500 Performance and Engine

Under the hood sits GMC's EcoTec3 5.3L V8 paired with a 10-speed automatic transmission with overdrive and full-time 4WD. This engine produces 355 horsepower and 383 lb-ft of torque, giving you plenty of muscle for towing trailers, hauling gear through Yakima County's agricultural terrain, or navigating the mountain passes east of the Cascades.

The 10-speed automatic is one of the best transmissions in the half-ton segment — it keeps the engine in its ideal power band whether you're cruising Highway 12 or climbing a grade loaded down with equipment. Dynamic Fuel Management (DFM) adjusts cylinder usage in real time for improved fuel efficiency during highway cruising, helping offset the V8's appetite. The AT4 trim adds a 2-inch factory lift, Rancho monotube shocks, a locking rear differential, and an off-road suspension tune that makes this truck a legitimate trail runner right from the factory.

GMC Sierra 1500 AT4 Features and Interior

The AT4 trim doesn't just perform — it lives up to the premium GMC badge inside the cabin. As a Crew Cab with a 5 3/4-ft bed, this Sierra gives you four full-size doors with rear-seat legroom that puts most midsize SUVs to shame, making it genuinely comfortable for families and work crews alike.

Standard AT4 features on the 2020 Sierra 1500 include leather-appointed seating, heated front seats, a power driver's seat, Apple CarPlay and Android Auto integration, GMC's 8-inch diagonal infotainment display, a Bose premium audio system, wireless charging, rear camera with trailer hitch guidance, and GMC's MultiPro tailgate — a six-function tailgate design that adds real utility for loading cargo, sitting on the edge, or using it as a work surface. The AT4 also adds unique dark exterior badging, black assist steps, and an exclusive red tow hook for that purposeful off-road aesthetic.

GMC Sierra 1500 Reliability and Ownership

The 2020 GMC Sierra 1500 carries one of the strongest reliability reputations in the full-size truck segment. The 5.3L EcoTec3 V8 has been refined over many model generations and is regarded by mechanics and owners alike as one of GM's most bulletproof powertrains. Owners consistently report low maintenance costs outside of standard service intervals — oil changes, filters, and brake work.

The 10-speed transmission in this generation received improved calibration over earlier versions and is generally well-regarded in real-world use. The 2020 Sierra also benefited from a full body and interior redesign that addressed previous complaints about cabin materials and infotainment responsiveness. As a truck that's clearly been used — over 111,000 miles — it's a smart move to verify service history, inspect the undercarriage if it's been used off-road, and take it for a proper test drive on both surface streets and the highway.

Why Buy From Own a Car Yakima in Yakima, WA

Own a Car Yakima has built a strong reputation in the Yakima Valley as a straightforward, no-pressure used vehicle dealer. Located in Yakima, in the heart of Yakima County, the dealership serves buyers from across Central Washington who want quality used vehicles without the games that come with some larger stores.

Whether you're a contractor hauling equipment through the Kittitas Valley, a farmer needing a reliable workhorse in the Lower Yakima Valley, or an outdoor enthusiast looking to explore the Cascades and Yakima River Canyon on weekends, Own a Car Yakima understands what Central Washington buyers actually need from a truck. Their team is known for making the buying process simple, and their inventory is hand-selected to offer real value at real prices.

Financing a Used GMC Sierra 1500 Near Yakima

Financing a used truck in the $30,000 range is very manageable, and Own a Car Yakima works with a range of lenders to find options that fit your budget and credit profile. Whether you have excellent credit, are rebuilding, or are somewhere in between, the finance team can structure a deal that works for buyers throughout Yakima County and the surrounding area.

Buyers from Selah, Union Gap, Wapato, Sunnyside, and the broader Kittitas and Benton County areas regularly make the trip to Own a Car Yakima because of the competitive pricing and flexible financing. A truck priced at $33,999 with a solid down payment or trade-in can put your monthly payment in a very comfortable range — call 509-424-3973 to get pre-qualified before you even come in.

Frequently Asked Questions

Is the 2020 GMC Sierra 1500 AT4 a good buy?

Yes — the 2020 Sierra 1500 AT4 is widely considered one of the best used truck values in the half-ton segment. It combines a proven 5.3L V8, a premium interior, and a factory off-road package at a price significantly below its original MSRP. For buyers in Washington State who need a capable all-weather and off-road-ready truck, the AT4 trim is especially well-suited.

How many miles is too many on a GMC Sierra 1500?

The EcoTec3 5.3L V8 in the Sierra 1500 is known to last well beyond 200,000 miles with proper maintenance. At 111,516 miles, this truck has plenty of life ahead of it. The key is verifying the service history and having a trusted mechanic inspect it — something Own a Car Yakima welcomes and encourages.

What does the AT4 trim include over other Sierra trims?

The AT4 is GMC's dedicated off-road trim and adds a factory 2-inch lift, Rancho shocks, a locking rear differential, off-road suspension tuning, skid plates, unique AT4 badging, and red tow hooks. Inside, it includes leather seating, premium audio, heated seats, and the MultiPro tailgate — features that put it well above the SLE and SLT trims.

What is the towing capacity of a 2020 GMC Sierra 1500 with the 5.3L V8?

When properly equipped, the 2020 Sierra 1500 with the 5.3L V8 can tow up to 11,500 pounds — making it more than capable of handling horse trailers, utility trailers, boats, and fifth-wheel setups commonly used throughout agricultural and outdoor recreation areas of Central Washington.

Is 4WD important for driving in Yakima, Washington?

Absolutely. While Yakima itself receives relatively light snowfall, the surrounding mountain passes, rural farm roads, and recreational areas in Yakima County can get genuinely challenging in winter. The AT4's 4WD system with a locking rear differential gives you meaningful capability well beyond what a 2WD truck or all-wheel-drive SUV can offer.

Serving Yakima and Surrounding Areas

Own a Car Yakima is proud to serve truck buyers throughout the Yakima Valley and beyond. If you're coming from Selah, Terrace Heights, Union Gap, Wapato, Toppenish, Sunnyside, Grandview, Prosser, or Ellensburg in Kittitas County, this Sierra 1500 AT4 is worth the drive.

Buyers from the Tri-Cities area — Kennewick, Richland, and Pasco — regularly explore Own a Car Yakima's inventory for hard-to-find trucks like this AT4 that offer genuine value. Whether you're heading west over Chinook Pass or east through the Yakima Canyon, you won't find a better combination of off-road capability and day-to-day comfort in this price range.

Contact Own a Car Yakima Today

Don't let this 2020 GMC Sierra 1500 AT4 slip away — trucks in this trim level at this price point don't last long in Yakima County. Call Own a Car Yakima at 509-424-3973 to check availability, ask about financing, or schedule a test drive. You can also stop by the lot in Yakima, WA to see it in person — walk around the Gray exterior, sit in the Crew Cab, and get a feel for what this AT4 can do.

Stock #8727 — VIN: 1GTP9EEL4LZ119982. Reach out today and let the team at Own a Car Yakima help you drive home in the right truck.