The Extended-Wheelbase Full-Size SUV

Quick Answer

The GMC Yukon XL is the extended-wheelbase, three-row full-size SUV that blends GMC luxury with maximum room — offering up to 144.5 cu ft of cargo, 36.7 in of third-row legroom, and seating for up to 8 passengers.

Available with three powerful engines — including an available 3.0L Duramax diesel — and up to 8,400 lbs of towing, it's engineered for families and adventurers across Northern Colorado.

The Yukon XL Story

An Evergreen Overview

Since the Yukon nameplate debuted in 1992, GMC has answered the demand for maximum space with the extended-wheelbase Yukon XL, which joined the lineup in 2000. The current fifth generation, which launched in 2021, brought a fully independent rear suspension that dramatically improved third-row room and ride quality. With a modern design language and a broad powertrain lineup, the Yukon XL now competes directly with the Ford Expedition MAX and Jeep Wagoneer L while maintaining a distinct GMC identity rooted in quality and innovation.

Within GMC's lineup, the Yukon XL occupies the flagship long-wheelbase SUV position, paired mechanically with the Chevrolet Suburban on a shared architecture. However, GMC positions the Yukon XL with more distinctive design cues, premium materials, and exclusive trim offerings — particularly the Denali luxury line and the AT4 off-road variant. This differentiation allows Yukon XL buyers to choose a premium, maximum-room SUV without sacrificing capability or style.

The Denali nameplate carries a rich heritage in GMC, dating back to 1998 as the brand's luxury flagship trim. Today, it represents the luxury-focused pinnacle of the Yukon XL lineup, featuring upscale materials, advanced technology, and premium comfort features. The AT4 trim line, introduced alongside the fifth-generation redesign, brings genuine off-road capability with lifted suspension, skid plate protection, and all-terrain tires — and the new-for-2026 AT4 Ultimate elevates it further, making the Yukon XL a truly versatile choice for Colorado families who demand both luxury and adventure with maximum room.

Power & Capability

Towing & Engine Heritage

The Yukon XL is engineered for serious hauling. In typical configurations, it offers a maximum towing capacity in the 8,000–8,400 lbs range, depending on engine selection and drive configuration. The 5.3L V8 with the available Max Trailering Package achieves up to 8,400 lbs (2WD), while the 6.2L V8 and Duramax diesel deliver about 8,200 lbs in 2WD and 8,000 lbs in 4WD. Because of the XL's added length and weight, these ratings run roughly 100–200 lbs under the short-wheelbase Yukon — a fair trade for the extra cargo and passenger room. All engines pair with a modern 10-speed automatic transmission that balances efficiency with responsive performance.

The Yukon XL's trailer tech suite includes integrated trailer brake control, trailer sway control, available HD Surround Vision, and Blind Zone Steering Assist with Trailering — perfect for long family road trips. The Max Trailering Package adds heavy-duty cooling, allowing drivers to tow safely across Colorado's varied terrain, from Front Range foothills to mountain highways. The XL's real party trick, though, is what fits inside: 144.5 cu ft of maximum cargo space and 41.5 cu ft even behind the third row.

The Yukon XL offers an exceptional powertrain lineup. The 5.3L V8 (L84) has been a stalwart in GMC vehicles for years, delivering 355 hp and 383 lb-ft of torque with solid reliability and real-world efficiency. The 6.2L V8 (L87), standard on the Ultimates and available elsewhere, produces 420 hp and 460 lb-ft — a commanding upgrade for those who prioritize performance. The Duramax 3.0L turbodiesel I-6 (LZ0), introduced with the 2021 fifth-generation redesign, offers a rare advantage in the segment: 305 hp and an impressive 495 lb-ft of torque, along with superior fuel economy for long-distance driving at altitude. All three engines pair seamlessly with a modern 10-speed automatic transmission, ensuring smooth acceleration, efficient highway cruising, and refined downshifting for mountain driving.

Trim Levels

Lineup Over the Years

Colorado Living

Excellence for Northern Colorado

The GMC Yukon XL has earned a devoted following across Northern Colorado — Greeley, Fort Collins, Windsor, Loveland, Evans, Longmont — for reasons deeply rooted in Colorado living. The Yukon XL's altitude-capable engines, especially the Duramax diesel, excel on Colorado's elevation-heavy drives without the performance penalties some competitors experience. From I-25 commutes to Winter Park ski weekends and Steamboat road trips, the Yukon XL provides legitimate capability with room for the whole family and all their gear.

Winter in Northern Colorado demands serious 4WD, and the Yukon XL delivers. Available and standard 4WD options ensure traction on snow-packed I-25 corridors and mountain ranch roads alike. Families around Horsetooth Reservoir, Estes Park, and beyond trust the Yukon XL's payload and towing for trailers, hay, equipment, and adventure gear — and its 144.5 cu ft of cargo for everything else. The spacious interior accommodates large families and extended road trips with genuine adult room in all three rows.

In a region where ranching, outdoor recreation, and mountain living define the lifestyle, the Yukon XL stands as a proven partner. When you need maximum room without giving up capability, it's no accident that Weld County families have chosen the Yukon XL for generations.

Competition

Yukon XL vs the Competition

In the extended-length, three-row segment, the Yukon XL's chief rivals are the Ford Expedition MAX and the Jeep Wagoneer L. Both are capable, modern SUVs, and in the interest of an honest comparison, both actually tow more than the Yukon XL — the Expedition MAX up to about 9,000 lbs and the Wagoneer L up to roughly 9,850 lbs. Where the Yukon XL pulls ahead is maximum cargo volume (144.5 cu ft vs the Wagoneer L's ~130.9 and the Expedition MAX's ~104 behind the first row), the breadth of Super Cruise's hands-free network, and the availability of the Duramax diesel for efficiency at Colorado altitude — something neither competitor offers.

FAQ

Frequently Asked Questions

About WCG

117 Years of Trusted Service

For 117 years, Weld County Garage has been Greeley's trusted destination for quality vehicles and expert service. Founded in 1908 by the Yoder family, we've built our reputation on honest dealing, genuine expertise, and a commitment to the Northern Colorado community. Today, Weld County Garage GMC serves families across Greeley, Fort Collins, Loveland, Windsor, Evans, and Longmont with a carefully curated inventory and certified technicians.

Our GMC sales team specializes in matching the right Yukon XL to each family's needs. Whether you're looking for a value-driven Elevation, an adventure-ready AT4, or a luxury-focused Denali, we provide transparent pricing, flexible financing, and genuine trade-in offers. We also stock genuine GMC parts and accessories, and our service department employs certified GMC technicians trained in the latest diagnostic and repair techniques.

Visit us today at 2699 47th Ave, Greeley, CO 80634, or call 970-400-9952 to schedule a test drive. We're open six days a week and look forward to helping you find your perfect Yukon XL.