Used 2020 GMC Sierra 1500 Consumer Reviews
Used Sierra 1500 for sale
Overpriced vehicle with many glitches
Vic, 08/02/2021
2020 GMC Sierra 1500 SLT 4dr Crew Cab 5.8 ft. SB (5.3L 8cyl 8A)
3 of 8 people found this review helpful
The warranty is extremely short and the intellilink system (monitor with all the electronic functions on the dash) is known to go black, not respond, or get insanely glitchy. It will will okay until right after the warranty period ends, then GMC won’t even make a decent effort at trouble shooting it or try to repair it. One is forced to pay for a completely new system and it has to be the same glitchy model (no upgrading to newer systems) leaving one with a bill of parts and labor in the thousands. One may think that the only loss is audio and GPS, but no, it controls climate, backup cameras, side mirrors, and so many other things… The dealers and the corporate office take absolutely no responsibility for a crappy product and simply state that these things happen with cars. If you do your research, you’ll find many people experience the same problem over and over…it’s just not worth paying for a $60k plus vehicle… Switched vehicle make all together and so far, BMW has treated a hundred times better and the vehicle seems to be of far greater quality. Visit GMC and then visit BMW and you’ll see a HUGE difference. Never getting a GMC again.
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The best truck I have ever driven
Atuzzo, 02/04/2021
2020 GMC Sierra 1500 AT4 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A)
1 of 1 people found this review helpful
2020 GMC Sierra AT4 6.2L 10-speed: the absolute best truck I have ever owned or driven. This truck will make it the 7th GM truck I have had, and while they do get better every year this one is heads and shoulders above the rest and miles better than anything else sold by the competition. The 6.2L has loads of power and low-end torque and still achieves 23/24 mpg on the highway even with the offroad tires. It is quiet, refined, luxurious, comfortable, and has options the other manufacturers don't even offer in their luxury vehciles. 10/10
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2020 GMC Sierra 1500 for sale near you
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- Base Double CabMSRP: $27,9908 mi away
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My Sierra / 85,000 miles
Deep South GMC guy, 10/12/2024
2020 GMC Sierra 1500 SLT 4dr Double Cab 4WD SB (5.3L 8cyl 10A)
1 of 1 people found this review helpful
Overall, the best truck I’ve ever owned. There have only been a couple of issues. At about 70,000 miles I caught my first “check engine” light. This truck is immaculately maintained, driven very carefully. I shouldn’t be seeing the CE Light that soon, IMO. I took it to the dealer, it was a $1200 job (GM agreed to cover half, my part was $600) to replace two injectors. I was suspicious because the truck was running perfectly in every way and my fuel mileage was excellent. Well, about 3,000 later it comes on again. Diagnosed as two bad injectors. I decided to treat a tank of gas with Techron fuel treatment. The CE light went off with a day or two. That’s happened twice more since on about 5000 mile intervals. Treated again with Techron…light goes away. Again, truck cranks/idles/runs perfectly…great fuel mileage. I’m thinking it’s an issue with the diagnostic system itself but I’m no professional mechanic. My other issue is around glass quality. My windshield split one summer day when I got in and turned the A/C. The replacement windshield seemed to be a much better piece of glass and has had no issues for years. The side and rear glass water stains very badly. Can’t really be cleaned but the view from inside the truck is still quite good.
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2020 GMC AT4 1500 6.2liter 10spd
Dr Cjj, 06/06/2022
2020 GMC Sierra 1500 AT4 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A)
1 of 1 people found this review helpful
Review choices sis not allow selection of the 6.2 liter engine which here in Colorado is by far my preference. The 10 speed tranny is big improvement over my 2017 1500 6.2 with the 8 spd which I traded in... The AT4 factory suspension has not needed the switch to Bilstein shocks which both my previous 2014, 2017, GMC 1500 trucks required. Big congrats to GMC engineers. I do light towing and only then I feel like a bit stiffer shocks in the rear would be useful. This is best of the 3 GMC1500's I've owned so far. I Love the AT4 package overall. The only issue for me has been this came equipped with Goodyear Dura- Track tires that were terrible for noise and vibration on most roads... I switched them out for some Michelins AT tires at about 20k miles, a vast improvement in noise levels and ride quality. Sold the Dura-tracks to a jeep owner who didn't care about noise. I feel fortunate to have purchased this truck at the end of 2019 before all the chaos in the supply chain showed up. I have about 31K miles on it... Would I buy this truck again? You Bet! I have had friends and strangers ask to buy the truck when I'm ready to sell... Not yet. I have given thought to the 2500 AT4 for its longer bed and higher GVW to be used hauling a camper, however, the current price and availability is a deterrent.
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Never better!!
Ron P, 10/22/2021
2020 GMC Sierra 1500 SLT 4dr Double Cab 4WD SB (5.3L 8cyl 10A)
1 of 1 people found this review helpful
Over 15000 miles and no problems! So far it's been a great truck!!
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