MPG MPH Sierra 
Clean Fleet Report
MARCH 30, 2021
The 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro showed-up in my driveway and the neighbors took notice. recently drove the 2021 GMC Sierra 1500 4WD Crew Cab AT4, powered by a 3.0-liter Weighing in at 5,640 pounds, the Sierra 1500 AT4 has a maximum payload of 1,810 pounds and can tow 8,800 pounds. Brains and brawn.
Clean Fleet Report
MARCH 24, 2025
The first thing we noticed was the performancethe 300 horsepower and 354 pound-feet of torque comes on quick and smooth, turning 0-60 mph in about 4.7 We also feature those efficient gas-powered vehicles that are among the top mpg vehicles in their class. 101 as we crossed the Golden Gate Bridge into Marin County.
Green Car Congress
AUGUST 21, 2014
The 8L90, the replacement for the venerable 6L80 six-speed in GM’s lineup, is offered as well as standard on 2015 Chevrolet Silverado, GMC Sierra and GMC Yukon Denali/Yukon XL Denali models equipped with the 6.2L In the 2015 Corvette Stingray, the new 8-speed enables a class-leading 29-mpg (8.1 l/100 km) EPA highway estimate—a 3.5%
Clean Fleet Report
OCTOBER 26, 2022
liter mild hybrid produces 335 hp and has an EPA rating of 20 mpg city/27 highway and 22 combined. mpg, which was a nice surprise for such a powerful engine. Selecting the Dynamic drive mode for a wonderful throaty exhaust note, the acceleration was spirited, with 0-60 mph consistently turned in the 5.2 Hitting the Road.
Clean Fleet Report
JUNE 27, 2024
second 0-60 mph time. Extended 65+ mph cruising is when Econ would be considered, but know the accelerator pedal is dumbed-down a bit and the A/C doesn’t run at full pop, both of which are compromises for getting more range. The e:FCEV’s performance from the 174 horsepower electric motor with 229 pound-feet of torque produces an 8.5
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