We're taking a closer look at the 2025 GMC Sierra AT4 and Sierra Elevation in the following side-by-side photo comparison, ...

We're taking a closer look at this pre-refresh Chevy Silverado Trail Boss LT and refreshed GMC Sierra AT4 in the following GM Authority Photo Comparison.

When you want to go off-road, uptown-style, GMC ... the HD AT4 -- has an MSRP that starts at $70,100. Both the 2500 and 3500 Sierra Heavy Duty trucks have an AT4 trim. The HDs share many interior ...

The 2026 GMC Sierra EV AT4 provides off-roading upgrades that would have been useful when I got stuck in the mud.

Originally available in Denali specification exclusively, the Sierra EV is entering ... and Forest Storm for the interior. GMC says that Forest Storm is exclusive to the AT4 for model year 2026.

Get an online offer in 2 minutes using our Sell My Car tool. Actual price and payments may be different due to local rebates, specials, fees, and credit qualifications. Consult your dealer for actual ...

What is the MPG of the 2021 GMC Sierra 1500 AT4? The 2021 GMC Sierra 1500 AT4 offers up to 18 MPG in city driving and 21 MPG on the highway for a combined rating of 19 MPG. These figures are based ...

Please use care in your use of the information provided. How much horsepower and torque does a 2025 GMC Sierra 2500HD Pro Regular Cab Long Box have? The 2025 GMC Sierra 2500HD Pro Regular Cab Long ...