2021
GMC Sierra 1500

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The good & the bad
Available cars near you
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$52,9906 mi away
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$47,9816 mi away
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7 mi away
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$32,4957 mi away
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8 mi away
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8 mi away
Safety review
- Overall rating
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4/5
- Combined side rating front seat
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5/5
- Frontal barrier crash rating driver
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5/5
- Frontal barrier crash rating passenger
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4/5
- Overall frontal barrier crash rating
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4/5
- Overall side crash rating
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5/5
- Rollover rating
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4/5
- Side barrier rating
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5/5
- Side barrier rating driver
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5/5
- Side pole rating driver front seat
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5/5
- Side pole rating driver front seat
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5/5
Factory warranties
New car program benefits
Certified Pre-Owned program benefits
Compare similar vehicles
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2021GMC Sierra 1500Starts at$30,10014 City / 19 HwyMPG3Seat capacityGas V6EngineRear-wheel driveDrivetrain2,431 lbsPayload Capacity9,900 lbsTowing Capacity
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2020GMC Sierra 2500Starts at$35,800-MPG3Seat capacityGas V8EngineRear-wheel driveDrivetrain3,798 lbsPayload Capacity18,500 lbsTowing Capacity
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2022GMC Sierra 1500 LimitedStarts at$31,20019 City / 22 HwyMPG3Seat capacityGas V8EngineRear-wheel driveDrivetrain2,284 lbsPayload Capacity13,000 lbsTowing Capacity
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2022Chevrolet Silverado 1500Starts at$34,60019 City / 22 HwyMPG2Seat capacityTurbocharged Gas I4EngineRear-wheel driveDrivetrain2,174 lbsPayload Capacity12,900 lbsTowing Capacity
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2019GMC Sierra 1500Starts at$29,60016 City / 21 HwyMPG3Seat capacityGas V8EngineRear-wheel driveDrivetrain2,278 lbsPayload CapacityN/ATowing Capacity
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Most recent
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Bought a 2021 GMC Sierra SLT used 18k on it.
Bought a 2021 GMC Sierra SLT used 18k on it. Drove it 350 miles and the left band of lifter went bad,bent push rod and rocker arms. Got back and drove it about 300 miles and had the oil changed to make sure there was no metal in it from the work that was done. The next day I started up and it had 70+ pounds of oil pressur.- Purchased a Used car
- Used for Having fun
- Does not recommend this car
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No recomiendo a nadie comprar GMC Denali antes de 70000
No recomiendo a nadie comprar GMC Denali antes de 70000 millas se daña el motor y antes de 80000 millas se daña las transmisión y el diferencial son pura belleza pero es un problema te cobran 14000 por el motor solo- Purchased a New car
- Used for Transporting family
- Does recommend this car
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This truck has a jerk when changing gears sometimes.
This truck has a jerk when changing gears sometimes. I enjoy the truck overall easy to handle and comfortable. Drive with ease sight is good when driving.- Does recommend this car
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GMC 1500 2018
Rims crack 8 speed automatic horrible ,motor oil pump ,on the 3 motor 5.3 fuel pump issues Tron body sensor issue oil pressure sensor seats bad o- Purchased a Used car
- Used for Commuting
- Does not recommend this car
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Brake Pad Monitor
2021 GMC sierra 1500, 5.3, crew cab 4x4, 21000 miles. brakepad monitor lites up. dealership says needs brakes and rotors in back. one mo. on warranty. our rural roads dirty up the monitor. Needs new monitor. brakes look great to me. No noises. dealer says parts on order GM strike. Can't replace myself cause of computer...- Purchased a Used car
- Used for Commuting
- Does recommend this car
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I would buy it again…
Bought a 2021 (new in April 2021) GMC Sierra 1500 SLE with the 3.0 liter, 6 cylinder Duramax diesel engine. My truck is a 4 wheel drive so I get slightly less fuel (NOT gas) economy. I get between 22 and 24 MPG in the city and my best for highway was 33.7. I am pleased with the performance and tow capabilities. I like the- Purchased a New car
- Used for Commuting
- Does not recommend this car
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Fun but not safe
I paid a premium for my used 2021 because they were hard to find in my area. It was my first GMC. I loved the way the 6.2L engine performed, and still do. The problem is all of the “safety “ features. After two months of driving I had a list of thirteen different safety issues. Like the adaptive cruise control not slowing the- Purchased a Used car
- Used for Commuting
- Does not recommend this car
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Early brake pad failure with normal use
Brake pads needed to be replaced at just over 10,500 mi. Dealer said it was due to dirt roads and winter salt on the roads and that it was a common problem. First truck, btu neer had such problems on my Audi, Subaru, Volvos, Jeeps, and Toyotas. Brake pad replacement due to standard road conditions is not "Professional Grade"- Purchased a New car
- Used for Commuting
- Does not recommend this car
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Good looking truck, and that's about it
Have the 3.0 with about 20k miles. First 6 months drove great, good MPG around 23 average. Now lucky to get 17, they have had to replace the NO2 cat converter, HVAC controls, door seals, updated radio software numerous times because the infotainment will sporadically shut off and go black. Bigger issues are the low gas mileage- Purchased a New car
- Used for Commuting
- Does not recommend this car
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2021 gmc sierra, nothing but headaches.
2021 sierra, truck only has 5800 miles on it. Been to the dealer twice for repairs. First time it took them 3 tries to fix it. It still wasn't fixed. Took it to another dealership. Took them a month to fix it. Drove it home then to work the next day. While returning home that day check engine light came on. Back to the dealership- Purchased a New car
- Used for Commuting
- Does not recommend this car
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Looking for Recall on Transmission
Im very concerned because the vehicle has barely 20,000 miles on it and it is having transmission issues. I have heard from other vehicle owners that they are having issues as well. I was looking for a recall but apparently GM hasn't done that yet!- Purchased a New car
- Used for Commuting
- Does not recommend this car
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Don’t do it
My husband and I purchased this truck two years ago. We really liked the way it looked. We have had to take this truck back to the dealer 3 times already because the engine light keeps coming on and the transmission jerking. The dealership rep says, “We can’t recreate the problem.” This is BS. It’s their product. They know what’s- Purchased a New car
- Used for Transporting family
- Does not recommend this car
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FAQ
What trim levels are available for the 2021 GMC Sierra 1500?
The 2021 GMC Sierra 1500 is available in 6 trim levels:
- (7 styles)
- AT4 (2 styles)
- Denali (3 styles)
- Elevation (7 styles)
- SLE (5 styles)
- SLT (3 styles)
What is the MPG of the 2021 GMC Sierra 1500?
The 2021 GMC Sierra 1500 offers up to 14 MPG in city driving and 19 MPG on the highway. These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on vehicle options, trim level, driving conditions, driving habits, vehicle maintenance, and other factors.
What are some similar vehicles and competitors of the 2021 GMC Sierra 1500?
The 2021 GMC Sierra 1500 compares to and/or competes against the following vehicles:
Is the 2021 GMC Sierra 1500 reliable?
The 2021 GMC Sierra 1500 has an average reliability rating of 3.5 out of 5 according to cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 GMC Sierra 1500 owners.
Is the 2021 GMC Sierra 1500 a good Truck?
Below are the cars.com consumers ratings for the 2021 GMC Sierra 1500. 60.7% of drivers recommend this vehicle.
- Comfort: 4.2
- Interior: 4.2
- Performance: 3.8
- Value: 3.6
- Exterior: 4.3
- Reliability: 3.5
GMC Sierra 1500 history
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2025 GMC Sierra 1500 -
2024 GMC Sierra 1500 -
2023 GMC Sierra 1500 -
2022 GMC Sierra 1500 -
2021 GMC Sierra 1500 -
2020 GMC Sierra 1500 -
2019 GMC Sierra 1500 -
2018 GMC Sierra 1500