Consider with caution
I have had my 2021 Sierra 2500HD Diesel Denali for less than a year now. I bought it because we are fulltime RV'ers hauling a 35' 5th wheel. The power is fantastic and feels like we're hauling nothing, even in the NC mountains. The looks inside and out are great as well. I love this truck...WHEN IT WORKS. I have had to have this truck serviced quite a few times already. The issues I have experienced so far are the camera system keeps going out randomly. Dealership says a software update was needed to fix it and completed. However the issue continues to occur. The stereo will go out randomly as well. Last occurrence I could not change the station or adjust the volume. Same suggested fix; Software update.(In the shop now...again). The DEF fluid gauge is completely unreliable. On multiple occasions the truck will say 200 miles till empty and will decrease power. Problem is that I just pulled away from filling up the DEF. Dealership fix is to use a manufacturer DEF fluid only. Lastly, I used the 4WD high for the very first time last week just to pull out of the muddy yard and get on the driveway. When I attempted to shift back into 2WD I got the dreaded "service 4WD". In the shop now. I can't see a scenario where I would buy this vehicle again with all of the repetitive issues. If you're shopping and considering this vehicle, consider it with extreme caution. This thing is an 80k turd bird.
GMC 2500 HD AT4
This is the first diesel I have owned. The power is amazing and I really like the room inside the cab. This truck is a beast... Love it!
Never had one. Always wanted one and love it.
I love my Denali. Beautiful truck inside out. When I drive down the road all heads turn. I couldn't have made a better choice. That's Cortez for you good service.
Early to tell truck has less than 100 miles
Truck was bought specifically to our travel trailer. We have to wait for 1000 break in before we can tow the trailer. So far the truck is very quiet, smooth running, & comfortable to drive. We were pleasantly surprised at how much interior storage space is available. Having the bed steps before rear tires and in the bumper sides is very nice. Bed rails are even with my shoulders so the steps get used a lot.
First diesel, excellent fuel mileage, much more comfortable and roomy compared to my previous 2016 GMC 2500 New mirror location does pose issue with seeing people or cars (blind spot) Overall extremely pleased
MY second GMC 2500 HD and it won't be my last.
I just upgraded from my 2016 GMC 2500 to a new 2021 GMC 2500. I really liked my 2016 and had decided it was the best truck I had owned in 40 plus years of owning and driving pickup trucks. I just picked up the 2021 and it is a vast improvement in almost everyway over the 2016. The technology, design and ride of the truck are spot on. The new truck is ultra quiet especially for a diesel. I really liked the slightly smaller overall size of my previous truck but I find myself quickly adjusting to this updated version. I have read reviews by others who alledge that the interior is not up to par against Ford and Ram but I honestly don't feel that way at all. Its hard for me to imagine a better package in a heavy duty pickup. I know from experience that this truck rides better than the other two manufacturers as they still emplay solid front axles as opposted to the GMC independent front suspension.
Incredible beast of a truck!!!
2021 GMC 2500 Denali is an exceptional truck. It’s ride is beyond any truck expectations. The auto operating running boards have turned out to be great for getting in and out of this beast of a truck. I got this truck to haul my 5th wheel trailer and it pulls the trailer like it’s not even there. Styling in and out is beautiful but sturdy and unique over its competitors. The info/ 15 camera system is unbelievably helpful especially pulling the trailer. This truck drives and rides better than most luxury sedans but is a beefy do it all truck.
Drivers seat is too low. I cannot see over the dash without sitting on pillows. I have never owned a vehicle this bad. So dangerous. We were told that power seats were not available for this model
Truck is highly overpriced for what you get
I’ve owned this truck for one week doesn’t do anything for me it’s an OK truck but not worth the price that I paid that’s a pick up truck not a Cadillac
Very nice vehicle!
This vehicle has great styling, a powerful engine, comfort, excellent performance, and is enjoyable to drive. I would recommend this truck to any one interested in a new 3/4 ton truck.