We recently shared with you how the particular 2020 GENERAL MOTORS CO Sierra HD costs during large towing , and how a 2019 GMC Sierra AT4 Duramax carried out during a rather grueling off-roading occasion up in Wyoming. But how about the 2020 GMC Sierra HD AT4 ? We took GMC’s latest dedicated rough-road workhorse out on the open road and on tough terrain, and here’s what it is like to drive it.
Before we head onto our own impressions, let’s underline some fascinating fun facts about GMC’s latest experience machine. Since the AT4 variant offers thus far proven successful on the regular 2019 GMC Sierra 1500 from the sales standpoint, it only is sensible that it be extended to the Sierra Heavy Duty pickups, right?
It’s an interesting niche that slot machine games between a standard three-quarter / one-ton truck and a full-on dune-jumping device like the Ford F-150 Raptor, which usually both Ram and Ford are usually attempting to fill with the 2019 Ram Power Truck and the 2020 Ford Super Responsibility Tremor .
GMC’s AT4 model adds just enough performance-enhancing elements to take your heavy-duty truck away beaten paths without fear of harming it. Among the enhancements are veer plates front and rear, tow line hooks, Rancho Shocks, an Eaton rear locking differential and rough-road specific tires. The Sierra HIGH DEFINITION AT4 also looks much meaner than a standard Sierra 2500HD or even 3500HD thanks to a blacked-out billet grille and wheels.
Yet what interests us the most is the fact that while the 2020 GMC Sierra HIGH-DEFINITION AT4 can be powered by GM’s tried and proven 6. 6L L8T OF V8 good for 401 hp and 464 pound-feet of torque, it is also fitted with the 6. 6L L5P V8 turbo-diesel Duramax engine which usually pumps out 445 horsepower plus 910 pound-feet of torque, allowing the particular 2020 GMC Sierra HD AT4 to be the dedicated off-road pickup truck that will boasts the highest towing rating within the segment.
We drove the particular Sierra HD AT4 both off and on the road. Just like the Denali model we all drove to tow that large trailer, we were pleased by the Duramax engine’s power delivery, smooth plus free of unwanted turbo lag. The particular Allison-branded ten-speed automatic transmission seemed to be a gem as it always appeared to find the proper gear and downshifted smoothly when applying throttle.
The Rancho Shocks suspension system upgrade was also impeccably smooth, each on the road and on the bumpy things during our short off-road stop. However , the off-road tires do lead to higher-than-average cabin noise. I was also disappointed by the rattles all of us heard from the truck’s cabin whenever things got bumpy.
Aside from a Spartan interior with doubtful build quality in some areas, we discovered the GMC Sierra HD AT4 to be a convincing package for anyone wanting off-road capability without losing one of the heavy-duty benefits.
2020 GMC Sierra HD Pictures