Video: 2023 Chevy Silverado 3500 & GMC Sierra HD Spied! What Big Changes Are These Prototypes Hiding?

These trucks are in Colorado for high altitude testing.

2023 Chevy Silverado / GMC Sierra HD spied
Images by: Brady Vensor

Check out these 2023 Chevy Silverado 3500 and GMC Sierra HD prototype trucks that are captured testing in the wild by TFLtruck viewer – Brady Vensor. Thank you Brady for sending these images to us. What are these prototypes hiding behind the camouflage? Let’s take a closer look.

These test trucks were spied near Golden, Colorado undergoing high-altitude testing with and without trailers. As you can see, all prototypes are wearing camouflage on the front and rear sections. The cab itself appears to be the same as it is now, which is just fine. The current GM heavy-duty truck cabs are very spacious and comfortable. The camouflage is likely hiding new grille designs, new headlights, and new taillights and rear sections.

You can see some of the 3500 dually-rear-wheel trucks are hitched up to large gooseneck trailers. Ford, Ram, and GM are all currently fighting for supremacy of being able to tow a gooseneck trailer that weighs up to 37,200 lbs. Is GM targeting capability that is beyond that? Perhaps max trailer weights that are approaching 40,000 lbs? We will have to wait at least a year to find out for sure.

One of the trailers they are using is a BigTex that is labeled 4XGN (which translates to 40,000 Goose Neck). Are they really preparing to tow 40,000 lbs? We cannot say this for sure at this point.

Many of these trucks are using new design alloy wheels that add new style and heavy-duty strength. We hope to see these prototypes hauling heavy trailers up and down the Ike Gauntlet – the world’s toughest towing test.

Other updates Chevy and GMC are working on likely include the interior, power output of their diesel and gas engines, and perhaps some advanced technologies such as Super Cruise (semi-autonomous driving) for heavy-duty trucks.

https://youtu.be/Dii45lL3beo