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.