Fuel Ecoonmy

2021 Chevrolet Tahoe, Suburban nearly twice as fuel efficient as the Nissan Armada

The 2021 Chevrolet Tahoe offers best-in-class fuel economy.

Photo courtesy of Chevrolet

The 2021 Chevrolet Tahoe is the most fuel-efficient full-size SUV in its class and the 2021 Chevrolet Suburban isn't far behind. Further behind are the Ford Expedition, Lincoln Navigator, Nissan Armada, and Infiniti QX80, the two chief rivals of the models.

The best-in-class figures are courtesy of General Motors' 3.0-liter Duramax turbo-dielse engine. That engine is new for the 2021 model year in the Tahoe and Suburban. Rear-wheel drive Tahoes get 21 mpg in the city, 28 mpg on the highway, and 24 mpg combined. Four-wheel drive models get 20 mpg in the city, 26 mpg on the highway, and 22 mpg combined.

2021 Chevrolet Tahoe The 2021 Chevrolet Tahoe has been completed redesigned.Photo courtesy of Chevrolet

Chevy's 2021 Suburban gets 21 mpg in the city, 27 mpg on the highway, and 23 mpg combined when equipped with front-wheel drive. Four-wheel drive Suburbans get 20 mpg in the city, 26 mpg on the highway, and 22 mpg combined when equipped with front-wheel drive.

The diesel power plant is the first diesel engine offered in GM's full-size SUVs since 1999. It first appeared as part of the GM lineup in the 2020 Chevrolet Silverado. In that application it quickly earned accolades for its quiet operating noise and fuel efficiency, as well as its near-immediate delivery of power.

In every application, the Diesel engine is paired with a 10-speed automatic transmission.

The 2021 Tahoe's engine gets 277 horsepower and 460 pound-feet of torque when equipped with the engine. Diesel-powered front-wheel drive models have a maximum towing capacity of up to 8,200 pounds and a max payload of 1,717 pounds. With the same engine under the hood, the 2021 Suburban has a maximum towing capacity of up to 8,000 pounds and a max payload of 1,625 pounds.

2021 Chevrolet Tahoe The 3.0-liter turbo-diesel is a relatively new addition to the GM lineup.Photo courtesy of Chevrolet

"The 3.0L Duramax turbo-diesel brings responsive torque and a smooth driving experience, ideal for those who tow or spend many hours behind the wheel," said John Barta, assistant chief engineer for the 3.0L Duramax. "Not only is the 3.0L Duramax a refined engine, but the total experience benefits from the efforts to deliver enhanced driving dynamics in Tahoe and Suburban through the independent rear suspension and available Magnetic Ride Control and Four-Corner Air Ride Adaptive Suspension."

The 3.0L Duramax turbo-diesel is available on the LS, LT, RST and Premier trims with an MSRP of $995 over the base 5.3L V8 gas engine. It is also available in the High Country trim as a $1,500 MSRP decrease over the standard 6.2L V8 gas engine.

The first customer deliveries of the 2021 Tahoe and Suburban with the available 3.0L Duramax turbo-diesel are expected to begin before the end of the year.

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The 2021 Nissan Rogue is made from recycled aluminum.

Photo courtesy of Nissan North America

While General Motors is busy readying its Spring Hill, Tennessee plant to run strictly on solar power, Nissan is making its Rogue out of recycled metals just down the street. The 2021 Nissan Rogue is the company's first global model built using a closed-loop recycling system for aluminum parts.

Using a closed-loop recycling system has several benefits. It saves 90 percent of the energy that would normally be used to create the parts that are now made of recycled parts. This type of system also helps reduce carbon dioxide emissions compared to the process of making products out of raw materials.

2021 Nissan Rogue The rear doors, which are stamped from aluminum alloy, open wide on the 2021 Rogue. Photo courtesy of Nissan North America

The process starts when scrap metal is shredded and collected through a pneumatic system. Nissan then separates the different grades of aluminum in order to ensure that the high-quality scrap is collected and sent to suppliers according to which parts they supply. Different grades of material are used to make different parts of the vehicle.

The scrap is then made into sheets of aluminum, which is delivered in rolls to Nissan where it is transformed into parts for the Rogue. The hood and doors of the 2021 Rogue are stamped from the aluminum alloy.

Aluminum, which is lighter than steel, is used to reduce vehicle weight, which helps to improve fuel efficiency and power performance of the vehicle.

Nissan redesigned the Rogue for the 2021 model year. It is more powerful and spacious than its predecessor. The Rogue is also chocked full of family-friendly features and fresh technology including a new high-tech driver information screen.

Nissan builds the 2021 Rogue in Kyushu, Japan, and Smyrna, Tennessee. As part of the recycling process, Nissan has collaborated with Kobe Steel, Ltd. and UACJ Corp. in Japan, and with Arconic Corporation and Novelis Inc. in the U.S.

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The Ford Motor Company will recall about 3 million vehicles as part of the Takata airbag recall.

Photo by Matthew Horwood/Getty Images

Following the denial of a 2017 petition to the U.S. Department of Transportation National Highway Traffic Safety Administration (NHTSA), Ford Motor Company has announced a recall of 3 million vehicles, a move that will cost the company an estimated $610 million, according to internal estimates.

The petition is part of the larger Takata airbag recall and specifically involves the defect of phase-stabilized ammonium nitrate in the driver-side air bag inflators that Takata manufactured with a calcium sulfate desiccant. Ford wasn't the only recipient of the defective inflators. Mazda also utilized the parts.

The list of impacted Ford vehicles ranges from the 2006 to 2012 model years. They include Ford Ranger (2007-2011), Fusion (2006-2012), Edge (2007-2010), Lincoln MKZ/Zephyr (2006-2012), MKX (2007-2010), and Mercury Milan (2006-2011). Approximately 2.7 million of those vehicles are in the U.S. and 300,000 are in Canada.

Mazda is also part of the recall, with 5,848 vehicles effected by the inflator issue. Those models are 2007-2009 B-Series pickup trucks, which were built on the same platform using the same air bag inflators as the 2007-2011 Ford Ranger.

Late last year, the NHTSA ordered General Motors to recall 7 million trucks and SUVs after a four-year back-and-forth battle over whether or not the Takata air bag recall was absolutely necessary for GM products. The models recalled as part of this action are "GMT900" models that contain "SPI YP" and "PSPI-L YD" inflator variants. The GMT900 is a General Motors-specific platform that underpins a number of light- and heavy-duty pickup trucks and SUVs including: Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Silverado 2500/3500, GMC Sierra 2500/3500, Chevrolet Tahoe, Chevrolet Suburban, Chevrolet Avalanche, GMC Yukon, GMC Yukon XL, Cadillac Escalade, Cadillac Escalade ESV, and Cadillac Escalade EXT. The petition involves approximately 5.9 million model year 2007–2014 vehicles.

2014 Chevrolet Suburban The 2014 Chevrolet Suburban is one of the models NHTSA recently ruled needed to be recalled. Photo courtesy of Chevrolet

In early 2020, 10 million vehicles were recalled after having their original equipment replaced with new versions of the same thing with the same design and chemistry rather than newly designed parts.

The Takata airbag recalls are part of the largest automotive recall in U.S. history. It involves more than 67 million vehicles to date.

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