Interesting 2023 GMC Sierra HD AT4/Denali Prototype
Interesting 2023 GMC Sierra HD AT4/Denali Prototype

Spy photography of the refreshed 2023 GMC Sierra HD has been captured once again. This time, the truck captured is an interesting mix of trim levels that we’ve never seen before.

Interesting 2023 GMC Sierra HD AT4/Denali Prototype
Interesting GMC Sierra HD AT4/Denali Prototype

2023 GMC Sierra HD- Our spy photographer reports:

A new prototype for the coming update of the GMC Sierra HD trucks has been caught testing, and it’s rocking an odd mix of attributes that raise questions. We’re calling it an AT4/Denali mashup, which may signal a wider materials palette for those wanting to mix signs of ruggedness and upscale flair.

Off-Road-Leaning, For Sure
The Sierra HD prototype has the AT4’s red tow hooks peeking out from the front camouflage, suggesting this is a Sierra HD AT4 trim. Rancho shocks, and Goodyear Wrangler TraillRunner AT tires further support the AT4 story, or at least an off-road-focused package.

That Grille And That Chrome, Though
The prototype’s otherwise undisguised grille is visible through the camouflage, and it appears to have Denali overtones—with lots of grille mesh details instead of the chunky, segmented look found throughout the rest of the Sierra HD’s current trim levels. The grille looks blacked-out here, not blingy, but we can’t say if this is for aesthetic reasons, or because it’s an early prototype trying to keep details under less visible.

There are other chrome details on the truck, like the unique eight-spoke chrome-and-black wheels. There are also chrome side steps that match those available on the Denali and other trims, but are decidedly different from the Black Sport steps, or the black high-clearance steps that are available on the AT4.

This latest prototype represents our best look yet at the GMC Sierra HD’s mid-cycle upgrade, with some eye-catching style elements on display. It’s those elements, however, that don’t quite seem to match up to the combinations available in the current Sierra HD lineup. Perhaps more will become clear when various grille designs begin appearing on future GMC Sierra HD prototypes, and we can start to paint a sharper picture of what will be available sometime next year. Until then, check out and enjoy these latest visuals on the refreshed Sierra HD.

2023 GMC Sierra HD AT4/Denali Prototype Spy Photography

2023 GMC Sierra HD AT4/Denali Prototype
GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype
2023 GMC Sierra HD AT4/Denali Prototype