Used 2020 GMC Sierra 1500 Crew Cab Consumer Reviews
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Pretty Bummed Out
Matthew Laraway, 12/13/2020
2020 GMC Sierra 1500 4dr Crew Cab 4WD 5.8 ft. SB (4.3L 6cyl 6A)
6 of 6 people found this review helpful
Hopefully all will get resolved...coming out of a Tahoe with 110,000 miles and excited to get into my 2020 Sierra Denali 1500 Carbon Pro with the Duramax Diesel. At this point, I have had the car 2 weeks and it has been back at the deal twice, this time going on 4 days. First issue was a coolant sensor that set off an engine warning and the second problem is car wouldn’t start due to dead battery. Apparently 4 open recalls on the 2020 and I guess my dealer didn’t take care of them? They still can’t figure out what is draining the battery. Truck has about 900 miles on it. Now have the feeling of “what’s going to be messed up?” Every time I press the start button. Certainly takes the enjoyment out of owning this physically beautiful truck. When it works it is an absolute joy to drive and it is the best looking truck on the road....all that said....I want it gone.
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Very pleased with our GMC Trucks
John Corvo, 02/06/2020
2020 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 6.6 ft. SB (5.3L 8cyl 10A)
7 of 8 people found this review helpful
We have had seven new GM Trucks over the past ten years. The 2020 GMC SLT 1500 has to be my favorite so far. The 10 speed transmission is the most notable improvement. The larger cabin and tailgate are also very nice upgrades. GMC has the best styling of the 2020 full size pickups IMO. I'm not a fan of the engine shutting off when stopping at traffic lights. I very much agree that the SLT is the best buy the money. This latest body change drives larger than the previous. Over all very pleased with our 2020 SLT and have always favored GMC styling,
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crooked bed and still clunking rear noise
fish/hunting, 09/28/2020
2020 GMC Sierra 1500 SLT 4dr Crew Cab 5.8 ft. SB (5.3L 8cyl 8A)
4 of 4 people found this review helpful
Bought a new 2020 SLT (now at 1500 miles). noticed that the truck bed is mounted not straight(crooked from side to side) when I try to put pin stripes on. At 500 miles started rear end clunking noise(apparent known issue but GM don't wanted to correct it on new models?). Dealer did a service bulletin 18-na-183. but didn't fix the problem. Have another appointment with an another dealer on Oct 8 2020. see what happens there. such a headache!
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Engine & Electrical problems
Ramon , 01/14/2021
2020 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A)
7 of 9 people found this review helpful
Recently purchased my 2020 GMC SLT Sierra 1500 (October 2020). Truck was working correctly for the first 2 months, placed 3700 miles and began to notice the following issues. Hesitation while driving and electronic issues. The hesitation led to engine noise and of course the check engine light activated (multiple alerts posted on driver screen as well), and resulted in the following needing replacement. Top end of engine opened, replaced lifters, and oil control valve. Not what a new car buyer wants to hear within the first three months of ownership. The electronic issues are revolving around the LKA (lane control/assist), and collision alert systems. Noticed that vehicle does not alert correctly when lanes are crossed, noticed that vehicles in front are not detected consistently. My vehicle came with the alert system on the seat as well, and it should work with the lane control system but it is very sporadic. The lane correction on steering wheel is spotty. These are suppose to make vehicle safer, but they don't work. The phone connection with apple car play is also spotty, and at times fails to connect. Recommend new buyers be careful when purchasing vehicles with excessive bells and whistles.
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Fourth GM truck I’ve owned,
Skip, 08/29/2020
2020 GMC Sierra 1500 SLT 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A)
3 of 3 people found this review helpful
I’ve owned a ‘94, 2002, 2011. Now a 2020. The first three were quiet, very comfortable, wonderful trucks. The 2020 is everything those were except for the damned seats. The seats are horribly uncomfortable. They don’t come close to the comfort of the 2011 I owned. The rest of the truck approaches perfection with only two minor annoyances: is much prefer the infotainment stereo to be either off or muted when I start the vehicle, same with the “Auto Off” feature.
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