2021 GMC Sierra 1500 Consumer Reviews

3.2 out of 5 stars
21 reviews
MSRP Starting at
$30,100

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Cons
1 out of 5 stars

5.3 Liter lifter replacement

JCCFP, 05/29/2021
SLT 4dr Crew Cab 5.8 ft. SB (5.3L 8cyl 8A)
11 of 11 people found this review helpful

I bought the 2021 Sierra in April, 2021 with high hopes. After 3,600 miles, the #4 cylinder lifter went bad requiring the removal of the head and valve lifters. Apparently, this is pretty common with the 5.3 liter engine with AFM. Oh, and the ride and mileage are horrible. As soon as I get the vehicle title from the state, I'm selling it and going back to a Buick Enclave.

Safety
5 out of 5 stars
Technology
4 out of 5 stars
Performance
5 out of 5 stars
Interior
5 out of 5 stars
Comfort
5 out of 5 stars
Reliability
1 out of 5 stars
Value
1 out of 5 stars
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1 out of 5 stars

Bad engine design

Kraig Monroe, 05/12/2021
SLT 4dr Crew Cab 4WD 6.6 ft. SB (5.3L 8cyl 10A)
24 of 26 people found this review helpful

My 2021 GMC Sierra 1500 had to have new lifters and push rods put in at 3600 miles then again at 5200 miles had the same problem waiting on dealership and General Motors to get back with me.I think they should buy back this truck in my opinion nobody should have this problem with a brand new truck purchased in January 2021.steelworker96@gmail.com

Safety
3 out of 5 stars
Technology
3 out of 5 stars
Performance
1 out of 5 stars
Interior
3 out of 5 stars
Comfort
5 out of 5 stars
Reliability
1 out of 5 stars
Value
1 out of 5 stars
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1 out of 5 stars

Complete shut down on 2021 GMC Sierra 1500 duraMac

Jr, 02/16/2021
Denali 4dr Crew Cab 4WD 5.8 ft. SB (5.3L 8cyl 10A)
21 of 23 people found this review helpful

Complete failure needed to be towed in three times less than 500 miles. Power or computer problems and still trying to fix!

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1 out of 5 stars

Broke down at 1,236 miles

Let down, 01/16/2021
AT4 4dr Crew Cab 4WD 6.6 ft. SB (3.0L 6cyl Turbodiesel 10A)
33 of 39 people found this review helpful

Bought a 2021 AT4 with 3.0L Duramax. Ordered it and waited 4 months for it to arrive. Love the ride & engine. Had to be towed to dealer with 1,236 miles due to a "transmission module issue." Been 3 days haven't heard back. Think transmission might've blown. Wouldn't go in reverse, would go into reverse position but wouldn't move. Engine power was reduced & check engine light came on. The 10 speed transmission was supposed to be solid.... be cautious

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5 out of 5 stars

Great Pickup

Laban, 05/01/2021
AT4 4dr Crew Cab 4WD 6.6 ft. SB (3.0L 6cyl Turbodiesel 10A)
6 of 6 people found this review helpful

GMC six cylinder deiseal is smooth, great towing, fuel efficient vehicle.

Safety
5 out of 5 stars
Technology
5 out of 5 stars
Performance
5 out of 5 stars
Interior
5 out of 5 stars
Comfort
5 out of 5 stars
Reliability
5 out of 5 stars
Value
5 out of 5 stars
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