2021 GMC Yukon XL vs. 2020 Mercedes GLS

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/08/09

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Yukon XL are reminded to check the back seat if they opened the rear door before starting out. The GLS doesn’t offer a back seat reminder.

The Yukon XL has a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The GLS doesn’t offer front seat center airbags.

Both the Yukon XL and the GLS have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all wheel drive, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

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GMC’s powertrain warranty covers the Yukon XL 1 year and 10,000 miles longer than Mercedes covers the GLS. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the GLS ends after only 4 years or 50,000 miles.

The Yukon XL’s corrosion warranty is 1 year longer than the GLS’ (6 vs. 5 years).

There are over 4 times as many GMC dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Yukon XL’s warranty.

Engine

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The Yukon XL’s standard 5.3 V8 produces 14 lbs.-ft. more torque (383 vs. 369) than the GLS 450’s standard 3.0 turbo 6-cylinder hybrid.

Fuel Economy and Range

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/08/09

An engine control system that can shut down some of the engine’s cylinders helps improve the Yukon XL V8’s fuel efficiency. The GLS doesn’t offer a system that can shut down part of the engine.

To lower fuel costs and make buying fuel easier, the GMC Yukon XL uses regular unleaded gasoline (premium recommended on Yukon XL Denali for maximum performance). The GLS requires premium, which can cost 20 to 55 cents more per gallon.

Transmission

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A 10-speed automatic is standard on the GMC Yukon XL, for better acceleration and lower engine speed on the highway. Only a nine-speed automatic is available for the GLS.

Tires and Wheels

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For better traction, the Yukon XL has larger standard tires than the GLS (265/65R18 vs. 255/50R19). The Yukon XL’s optional tires are larger than the largest tires available on the GLS (275/65R20 vs. 255/50R19).

The GMC Yukon XL’s wheels have 6 lugs for longer wheel bearing life, less chance of rotor warping and greater strength. The Mercedes GLS only has 5 wheel lugs per wheel.

The Yukon XL has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The GLS doesn’t offer vehicle monitored tire inflation.

The Yukon XL has a standard full size spare tire so a flat doesn’t interrupt your trip. A full size spare isn’t available on the GLS; it requires you to depend on roadside assistance and your vehicle will have to be towed.

Suspension and Handling

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For a smoother ride and more stable handling, the Yukon XL’s wheelbase is 10.7 inches longer than on the GLS (134.1 inches vs. 123.4 inches).

Chassis

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The front grille of the Yukon XL uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The GLS doesn’t offer active grille shutters.

Passenger Space

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The Yukon XL offers optional seating for 9 passengers; the GLS can only carry 7.

The Yukon XL has 2.9 inches more front headroom, 4.2 inches more front legroom, .1 inches more rear legroom and 2.1 inches more third row legroom than the GLS.

Cargo Capacity

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/08/09

The Yukon XL’s cargo area provides more volume than the GLS.

Yukon XL

GLS

Behind Third Seat

41.5 cubic feet

17.4 cubic feet

Third Seat Folded

93.8 cubic feet

42.7 cubic feet

Second Seat Folded

144.7 cubic feet

84.7 cubic feet

Towing

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/08/09

The Yukon XL 4WD with optional equipment can be flat towed on all four wheels (dinghy towed), allowing recreational vehicle owners to bring it with them on the road. When they reach their destination, the Yukon XL can be unhitched and driven around locally. The GLS can’t be towed flat on the ground.

Ergonomics

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The Yukon XL’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The GLS does not have an oil pressure gauge.

To improve rear visibility by keeping the rear window clear, the Yukon XL has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the GLS only has an intermittent setting, so in a hard rain visibility isn’t as good.

Model Availability

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/08/09

The Yukon XL is available in both rear-wheel drive and four-wheel drive configurations. The GLS doesn’t offer a two-wheel drive configuration.

Recommendations

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/08/09

The GMC Yukon/Yukon XL outsold the Mercedes GLS by over three to one during 2019.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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