2021 GMC Sierra

Road Test: 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro

January 7, 2026March 30, 2021 by John Faulkner

Is the 2021 GMC Sierra 1500 Duramax the best 1500 pickup on the market? Talking with “truck guys and gals” and reading truck forums, it seems to be near or at the very top.

Categories All-Wheel Drive, AWD, Clean Diesel, Test Drives Tags 2021 GMC Sierra, clean diesel, diesel, Duramax, four-wheel drive, Fuel economy, mpg, road test, test drive

Newsletter

SIGN UP TO GET NOTIFIED OF NEW STORIES!

ISEA 2025/2026 Rivian Raffle

ESSENTIALS

Why Ather Energy Electric Scooty Appeals to Premium EV Buyers
How Online Car Buying Is Changing the Math for Used-Vehicle Shoppers
How to Choose an Eco-Friendly Car for All Your Needs
4 Common Reasons EV Drive Units Fail and What You Can Do About It
The Smart Driver’s Secret: Why Second-Hand Car Parts Are Having Their Moment in 2026
Why Brake Pad Performance Becomes Inconsistent in Fleet Vehicles—And What’s Often Overlooked
Why EV Drivers Want Real Buttons Back, And What Carmakers Are Changing

Home
About us
Buyer’s Guide
Featured
News
Opinion
Personal
Tech
Test Drives
Car Knowledge

Search for: