If you're searching for a 2021 GMC Yukon XL SLT for sale in Marietta, GA, this full-size SUV at Pristine Cars & Trucks deserves a serious look. With seating for the whole family, a commanding presence on the road, and GMC's legendary build quality, this Yukon XL SLT checks every box for buyers who need space, capability, and comfort without compromise.
 

About This 2021 GMC Yukon XL SLT

The 2021 model year was a landmark for the Yukon XL — GMC completely redesigned this generation, delivering a longer wheelbase, dramatically improved third-row legroom, and an available air ride adaptive suspension that made the previous generation feel like ancient history. This particular example has 135,980 miles on the odometer, which is very normal for a full-size family hauler used as its intended daily driver. At this mileage, buyers in the Marietta and greater Cobb County area can still expect years of dependable service, especially with proper maintenance history.

The SLT trim sits in the upper tier of the Yukon XL lineup — above SLE and below Denali — meaning you're getting genuine premium content without paying Denali money. Think leather seating, heated front seats, a power panoramic sunroof, tri-zone automatic climate control, and GMC's infotainment suite with wireless Apple CarPlay and Android Auto. This is not a stripper spec — it's genuinely well-equipped.
 

2021 GMC Yukon XL Performance and Engine

Under the hood sits the ECOTEC3 5.3-liter V8, one of the most proven engines in the full-size truck and SUV segment. In the 2021 Yukon XL, this engine produces 355 horsepower and 383 lb-ft of torque, giving you confident acceleration whether you're merging onto I-75 or towing a trailer to Lake Allatoona for the weekend.

Paired with a 10-speed automatic transmission with overdrive, the powertrain is both responsive and fuel-efficient for its class. The 10-speed unit keeps the engine in its optimal RPM range, reducing highway drone and improving real-world fuel economy compared to the older 6-speed setups. As a 2WD configuration, this Yukon XL is ideally suited for Georgia's mostly paved terrain and year-round mild climate — you're not sacrificing capability for the everyday buyer in the Atlanta metro area.

GMC's Dynamic Fuel Management system on the 5.3 ECOTEC3 also means the engine can deactivate cylinders under light load, helping stretch your miles at the pump during long commutes through Cobb County and beyond.
 

GMC Yukon XL SLT Features and Interior

Step inside the 2021 Yukon XL SLT and you'll immediately notice the significant upgrade over the previous generation. The 2021 redesign brought a genuinely modern interior with soft-touch surfaces, a 10.2-inch infotainment touchscreen, and a clean, driver-focused layout.
 

Comfort and Seating

The SLT trim delivers perforated leather seating throughout, heated front seats, and available second-row captain's chairs or a bench — ideal for families who need maximum passenger capacity. The redesigned third row is one of the biggest talking points of this generation, offering real, adult-usable legroom for the first time in this model's history.
 

Technology and Convenience

Wireless Apple CarPlay and Android Auto keep you connected without the cable clutter. GMC's Rear Camera Mirror provides a wide-angle rear view even when the cargo area is stacked floor to ceiling. A Bose premium audio system, rear entertainment options, and a heads-up display round out the tech package that makes long road trips genuinely enjoyable.
 

GMC Yukon XL Reliability and Ownership

The 5.3-liter ECOTEC3 V8 is one of the most reliable engines General Motors has ever produced. Owners across hundreds of thousands of miles routinely report this engine going well past 200,000 miles with standard maintenance — oil changes, spark plugs, and air filters. The 10-speed transmission, while newer technology, has proven smooth and durable in real-world use.

The 2021 redesign also addressed one of the major complaints about previous-generation Yukon XL models — namely the independent rear suspension now standard on most trims, which dramatically improves both ride quality and third-row practicality. At 135,980 miles, this SUV is well into its ownership stride. Buyers should look for service records, check the transmission fluid condition, and inspect brakes and tires as part of any pre-purchase process — but there's nothing about this mileage on this platform that should be a dealbreaker for an informed buyer.
 

Why Buy From Pristine Cars & Trucks in Marietta, GA

Pristine Cars & Trucks is located in Marietta, in Cobb County, Georgia — one of the most accessible dealerships in the northwest Atlanta metro area. Buying from an independent dealer like Pristine means less overhead, more flexibility on pricing and financing, and a staff that can spend real time with you rather than shuffling you through a high-volume process.

For buyers throughout Cobb County and the surrounding region, Pristine Cars & Trucks offers a no-pressure environment where you can actually evaluate the vehicle, ask real questions, and make a confident decision. That's how a dealership earns a reputation in a community — and it's why local buyers keep coming back.
 

Financing a Used GMC Yukon XL Near Marietta

Financing a pre-owned full-size SUV near Marietta, GA is more straightforward than many buyers expect. Pristine Cars & Trucks works with a range of lenders to help buyers across the credit spectrum — whether you have excellent credit, are rebuilding, or are purchasing a vehicle for the first time. The Yukon XL's proven reliability and strong resale value also make it an attractive vehicle for lenders, which can work in your favor when negotiating a rate.

Buyers throughout Cobb County, from Kennesaw to Smyrna and Acworth to Powder Springs, have financed vehicles at Pristine. Bring your questions about monthly payments, trade-in value, and down payment options — the team is here to work through the numbers with you.
 

Frequently Asked Questions

Is the 2021 GMC Yukon XL a good buy?

Yes — the 2021 model year was a complete redesign that addressed nearly every complaint about the previous generation. Improved interior quality, dramatically better third-row space, independent rear suspension, and updated technology make it one of the best full-size SUV values on the used market right now.
 

How many miles is too many on a 2021 GMC Yukon XL?

With proper maintenance, the 5.3-liter ECOTEC3 V8 is known to last well beyond 200,000 miles. At 135,980 miles, this Yukon XL is past its steepest depreciation curve but still has a long service life ahead — making it an excellent value proposition for buyers who want maximum truck for their money.
 

What does the SLT trim include on the 2021 Yukon XL?

The SLT is a premium trim featuring leather seating, heated front seats, a power panoramic sunroof, tri-zone automatic climate control, a 10.2-inch touchscreen with wireless Apple CarPlay and Android Auto, the GMC Rear Camera Mirror, and Bose premium audio — among other features. It's a step below Denali but well above the base configuration.
 

Is 2WD okay for Georgia drivers on a Yukon XL?

For the vast majority of driving in Marietta and throughout the Atlanta metro area, 2WD is perfectly capable. Georgia's mild winters and mostly paved roadways mean 4WD is rarely needed, and 2WD models tend to return slightly better fuel economy. Unless you're regularly towing in loose terrain or driving unpaved mountain roads, 2WD is the practical choice here.
 

What should I check when buying a used Yukon XL with high mileage?

Key items include transmission fluid condition and shift quality, brake pad and rotor wear, tire tread and age, suspension components (especially the rear independent setup), and any service records showing oil change history. A pre-purchase inspection by a trusted local mechanic is always a smart investment.
 

Serving Marietta and Surrounding Areas

Pristine Cars & Trucks is proud to serve drivers throughout Cobb County and the greater northwest Atlanta region. Whether you're coming from Kennesaw, Smyrna, Acworth, Powder Springs, Austell, or Mableton, our Marietta location is an easy drive with convenient access from I-75 and I-285.

Families throughout Cobb County looking for a capable, well-equipped full-size SUV don't need to travel far. This 2021 GMC Yukon XL SLT is ready to test drive today, and the team at Pristine Cars & Trucks is ready to make the buying process simple and transparent.
 

Contact Pristine Cars & Trucks Today

Ready to get behind the wheel of this 2021 GMC Yukon XL SLT? Call Pristine Cars & Trucks in Marietta, GA at (770) 941-1194 to schedule your test drive or ask any questions about this vehicle. Our team serves buyers throughout Cobb County and the greater Atlanta area, and we're committed to making your next vehicle purchase a confident, stress-free experience. Come see us in Marietta — this Yukon XL won't last long.