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2020 GMC Sierra 3500 consumer reviews

$37,000–$39,800 MSRP range
side view of 2020 Sierra 3500 GMC
100% of drivers recommend this car
Rating breakdown (out of 5):
  • Comfort 4.9
  • Interior 4.9
  • Performance 4.9
  • Value 4.7
  • Exterior 5.0
  • Reliability 4.9
Explore the 2020 GMC Sierra 3500
Shop the 2020 GMC Sierra 3500

Great Diesel truck when emission sensors work

Great vehicle for pulling my fifth wheel RV which weighs around 20,000 pounds. This dually truck pulls the RV very nicely without any significant strain on the engine or the transmission. However, like all of today's diesel engines there are 4 different system of emissions on this truck. Each one of these emission systems has sensors associated with them. If one of these sensors goes bad the truck will not perform optimally and sometimes it will go into the limp mode. Unfortunately this is not unique to GMC trucks. All manufacturers are battling this system. Also, I have had to take the truck to the dealer for computer upgrades in order to improve performance. I wish these upgrades could be performed on line (through wifi or with my own phone service). It sure would make things a lot simpler and improve the through put of the dealers who are already strained because of the limited number of available diesel mechanics.


Great car for work!!

Comfort, ease of driving, style, convenient for work and we LOVE the tailgate! Great for towing our heavy fifth wheel and our dogs are riding in style!!


Great luxury ride with great pulling capabilities.

The Texas Edition combined with the X31 package and premium SLT makes a very nice combination. The Sierra 3500HD gives you a luxury interior and ride with all the capabilities of a great pulling truck. The Duramax is quiet yet powerful. It is no doubt the best of trucks for 2020.


Really impressed with the performance

Nicest truck I have ever owned preforms great with my RV Truck is comfortable and still works great when you need it to preform. Ride is nice and very roomy for all that want to travel with me


Good power very comfortable ride

Good power plenty of room the truck has all kind of new technology in it that helps with driving safety and with job performance Awesome


New GMC Sierra 3500

Loving our new GMC Denali. Tows our travel trailer like a dream. Perfect choice for us. Look forward to many years with it. Thanks Ferman.


As advertised

This truck is just as GMC advertised, Professional Grade! Tons of room inside and plenty of power under the hood for all the towing you want to do.


Very Relaible

Happy with purchase. Will be used to daily as a commute to work and home. Will be used when retired to travel the US and carry a 5th wheel.


I love this truck!!!

This truck is so comfortable. It’s like driving a luxury car with the power to tow whatever I need it to. I am very happy.