Best Car Reviews - 2021 GMC Yukon XL 4WD

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Introduction

The 2021 GMC Yukon XL 4WD is a full-size, three-row SUV designed for families, long-distance travellers and owners who need serious passenger, cargo and towing capability. Redesigned for 2021, the extended-length Yukon XL introduced a more spacious cabin, independent rear suspension and a modernized technology suite. This diesel version pairs four-wheel drive with a 3.0-litre Duramax inline-six turbo-diesel, giving the large SUV strong low-rpm torque and notably better highway economy than its gasoline V8 alternatives.

Design and Exterior Features

The Yukon XL has a bold, upright SUV shape, a large GMC grille and squared-off proportions that emphasize its truck-based capability. At 225.2 inches long, it is substantially longer than the regular Yukon, and that extra length is devoted largely to third-row and cargo space. The 2021 redesign brought sharper lighting, a more substantial road presence and a cleaner, more premium exterior than the previous generation.

225.2-inch overall length and 134.1-inch wheelbase.
LED signature headlamps, taillamps and fog lamps.
Standard 4WD configuration with trim-dependent transfer-case hardware.
AT4 trim adds an off-road appearance and equipment focus, while Denali adds more upscale detailing.

Interior and Comfort

The Yukon XL’s greatest strength is interior space. Its independent rear suspension helps create a more usable third row than the previous generation, while the XL body provides 41.5 cubic feet of cargo room behind the third row and up to 144.7 cubic feet with the rear seating folded. The cabin layout is practical, with large controls, broad front seats and available luxury upgrades that make the Denali feel considerably more premium. Material quality is strongest on SLT, AT4 and Denali models; the entry-level SLE is more functional than luxurious.

Three-row seating with room for up to nine occupants in selected configurations.
Tri-zone automatic climate control.
Available heated and ventilated front seats, heated second-row outboard seats and heated steering wheel.
Available power-folding third row, panoramic sunroof and power-sliding centre console.

Performance and Handling

This Yukon XL uses a 3.0-litre Duramax turbo-diesel inline-six with 277 horsepower and 460 lb-ft of torque, paired with a 10-speed automatic transmission and four-wheel drive. Peak torque arrives at a low 1,500 rpm, which suits relaxed highway passing, towing and carrying a full cabin. EPA figures for the diesel 4WD Yukon XL are 20 mpg city and 26 mpg highway, equivalent to approximately 11.8 and 9.0 l/100 km; combined economy is 22 mpg, or about 10.7 l/100 km. It is a large, heavy SUV rather than a sporty one, but the independent rear suspension gives it a more controlled ride than the older Yukon XL.

3.0-litre turbo-diesel inline-six with 277 hp and 460 lb-ft of torque.
10-speed automatic transmission and four-wheel drive.
EPA economy: 20 mpg city, 26 mpg highway and 22 mpg combined.
Available Magnetic Ride Control and four-corner Air Ride Adaptive Suspension on selected trims.

Technology and Connectivity

The 2021 Yukon XL moved decisively into the modern full-size SUV class with a large central touchscreen, smartphone integration and an available digital instrument display. The system is generally easy to use, although some owners have reported infotainment and camera-related glitches. Higher trims and option packages add premium audio, navigation, rear entertainment, a head-up display and a multi-camera view system.

10.2-inch GMC Premium Infotainment System.
Apple CarPlay and Android Auto compatibility.
Available Bose audio, navigation, rear-seat entertainment and head-up display.
Available high-definition surround-view camera system and rear camera mirror.

Safety Features

Standard GMC Pro Safety equipment includes automatic emergency braking, forward collision alert, lane-keeping assistance with lane-departure warning, following-distance indication, front pedestrian braking, IntelliBeam automatic high beams and a safety-alert seat. Available equipment includes adaptive cruise control, enhanced automatic emergency braking and additional camera technology. NHTSA gave the related 2021 Yukon model a four-star overall rating, but buyers should check the rating and open recalls for the exact Yukon XL VIN before purchase.

Automatic emergency braking and forward collision alert.
Lane Keep Assist with Lane Departure Warning.
Front pedestrian braking and automatic high-beam control.
Available adaptive cruise control and enhanced automatic emergency braking.
Check VIN-specific recall completion, including safety campaigns affecting some 2021 models.

Pricing and Variants

When new, the 2021 Yukon XL 4WD SLE started at approximately $57,695 in the United States, including destination pricing reported at launch. The 4WD range included SLE, SLT, AT4 and Denali trims, with the diesel offered on SLE, SLT and Denali. It competed directly with the Chevrolet Suburban, Ford Expedition Max, Jeep Wagoneer L and Toyota Sequoia; the GMC’s diesel option was a distinctive advantage for buyers prioritizing long-distance efficiency.

Pros and Cons

Pros

Exceptional cargo capacity and a genuinely useful third row.
Diesel engine delivers strong low-end torque and efficient highway cruising.
Independent rear suspension improves ride quality over the prior generation.
Confident towing and all-weather capability with 4WD.
Modern infotainment and extensive available luxury equipment.

Cons

Very large dimensions make city parking and narrow streets challenging.
Purchase price, fuel, tyres and repairs can be costly.
Diesel option was not available on the off-road-focused AT4 trim.
Some owners report electronics, camera and infotainment problems.
Reliability history and recall volume warrant careful used-vehicle inspection.

Maintenance and Common Issues

A reliable model-specific annual maintenance estimate is not consistently published, so buyers should budget according to mileage, dealer labour rates, diesel exhaust fluid use, tyres and the vehicle’s complex suspension and electronics. Owner-survey data and safety records indicate that a pre-purchase inspection and VIN recall check are particularly important. Commonly reported areas include infotainment or camera faults, electrical accessory issues, fuel-system or emissions-related concerns, suspension or steering concerns, and transmission-shift quality concerns. Some diesel-equipped GM full-size SUVs were also included in a later recall involving transmission control-valve wear, so recall completion should be confirmed by VIN.

Rating

Overall rating: 8.0/10. Design: 8.5/10. Comfort: 9.0/10. Performance: 8.0/10. Technology: 8.0/10. Safety: 7.5/10. The Yukon XL excels as a refined, highly capable long-haul family SUV, although its ownership costs and reliability considerations reduce its overall score.

User Reviews and Feedback

Owner feedback commonly praises the Yukon XL’s space, highway comfort and diesel range, while criticism tends to focus on complexity, repair concerns and the difficulty of manoeuvring such a large vehicle.

Families value the third-row room and large cargo area behind it.
Diesel owners often appreciate the low-rpm pulling power and highway economy.
Long-distance comfort and quiet cruising receive frequent praise.
Some owners report intermittent infotainment, camera or electrical issues.
Used buyers are advised to verify service history and all completed recalls.

Best Cars in This Category

2021 Chevrolet Suburban
2021 Ford Expedition Max
2021 Lincoln Navigator L
2021 Cadillac Escalade ESV
2021 Toyota Sequoia

Summary

The 2021 GMC Yukon XL 4WD diesel is best suited to buyers who need a full-size SUV with serious cargo room, three-row practicality, confident towing manners and efficient long-distance performance. Its Duramax diesel engine makes it especially appealing for high-mileage drivers, while the redesigned chassis and upscale available equipment help it feel more refined than earlier Yukon XL models. It is compelling when space and capability matter most, but prospective used buyers should inspect it carefully, confirm recall completion and budget realistically for premium full-size SUV ownership.