$46,998 $1,000 price drop

Used

2021 GMC Sierra 1500 AT4

64,591 mi.

$46,998 $1,000 price drop

Est. $865/mo^*

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We compared this car with similar 2021 GMC Sierra 1500s based on price, mileage, features, condition, and several other factors.

Avg. market price range

$42.2K $44.8K $47.5K $50.1K

$46,998 This is a good deal.

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Basics

Exterior color: White
Interior color: BLACK
Drivetrain: Four-wheel Drive
MPG: 22–26
Based on EPA mileage ratings. Use for comparison purposes only. Actual mileage will vary depending on driving conditions, driving habits, vehicle maintenance, and other factors.
Fuel type: Diesel
Transmission: Automatic
Engine: Turbo Diesel
VIN: 1GTU9EET9MZ203106
Stock #: 27006884
Mileage: 64,591 mi.

Features

Convenience

Heated Steering Wheel
Navigation System
Remote Start

Entertainment

Android Auto®
Apple CarPlay®
Bluetooth®
HomeLink
Premium Sound System
Satellite Radio
WiFi Hotspot

Exterior

Alloy Wheels
Sunroof/Moonroof
Tow Hitch

Safety

Backup Camera
Blind Spot Monitor
Lane Departure Warning

Seating

Leather Seats
Memory Seat

Additional popular features:

Keyless Entry, Keyless Start, LED Headlights, apple carplay/android auto, USB Port, Heated Seats, Cooled Seats, collision warning system, parking distance sensors, parking assistance, Automatic Emergency Braking, Rear Cross Traffic Alert, Stability Control, Brake Assist, trailer assist

View all features

Vehicle history by AutoCheck

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Seller’s info

CarMax Serramonte

Not rated Dealerships need five reviews in the past 24 months before we can display a rating.

(7 reviews)

401 Serramonte Blvd, Colma, CA 94014

Visit CarMax Serramonte

Seller’s notes about this car

CarMax values transparency and wants you to love your next car, not settle on it. Certain vehicles may have unrepaired safety recalls. Check nhtsa.gov/recalls to learn if this vehicle has an unrepaired safety recall. At CarMax, finding the right car is easy. You can shop online, get pre-qualified with no impact to your credit, and receive a trade-in offer all from the comfort of home. See carmax.com for details. Then, when it's time to buy, you can take advantage of express pickup at your local CarMax. And we stand behind every used car we sell with a 90-Day/4,000-Mile (whichever comes first) Limited Warranty. See store for details. Price excludes government fees and taxes, any finance charges, $85 CarMax document processing charge (not required by law), any electronic filing charge, and any emission testing charge. Price assumes that final purchase will be made in the State of CA, unless vehicle is non-transferable. Vehicle subject to prior sale. Applicable transfer fees are due in advance of vehicle delivery and are separate from sales transactions. Inventory shown here is updated every 24 hours.

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Price history

Listed 11 days ago.

$1,000 total price reduction!

7/23/25	Listed	$47,998
7/28/25	-$1,000	$46,998

Total price amount is based on price change information provided by the seller.

Consumer reviews

See what others are saying about the 2021 GMC Sierra 1500.

(56 reviews)

60% of drivers recommend this car

Rating breakdown (out of 5):

Comfort 4.2
Interior 4.2
Performance 3.8
Value 3.6
Exterior 4.3
Reliability 3.5

Most recent consumer reviews

Bought a 2021 GMC Sierra SLT used 18k on it.

February 21, 2025

By Chris from Colorado

Owns this car

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. Took it the dealer and now it is getting a new oil pump. This is a very nice truck to look at and drives nice but you should not have these kind of problems with a 50 thousand dollar truck. GM has paid fo6 all the fixes. Waiting to see what is next. Don't want to trade it in to give someone this problem. It suck to get a lemon.

Rating breakdown (out of 5):

Comfort 4.0
Interior 4.0
Performance 3.0
Value 3.0
Exterior 4.0
Reliability 1.0

Purchased a Used car
Used for Having fun
Does not recommend this car

3 people out of 3 found this review helpful. Did you?

Yes

No recomiendo a nadie comprar GMC Denali antes de 70000

September 27, 2024

By Oleidy from Atllanta

Owns this car

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

Rating breakdown (out of 5):

Comfort 1.0
Interior 1.0
Performance 1.0
Value 1.0
Exterior 1.0
Reliability 1.0

Purchased a New car
Used for Transporting family
Does recommend this car

2 people out of 4 found this review helpful. Did you?

Yes

This truck has a jerk when changing gears sometimes.

May 8, 2024

By Arvonia McWilliams

Owns this car

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.

Rating breakdown (out of 5):

Comfort 5.0
Interior 5.0
Performance 4.0
Value 4.0
Exterior 5.0
Reliability 5.0

Does recommend this car

9 people out of 11 found this review helpful. Did you?

Yes

See all 56 consumer reviews

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Car shopper resources

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2021 GMC Sierra 1500 AT4

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2021 GMC Sierra 1500 AT4

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Car shopper resources

Basics

Features

Vehicle history by AutoCheck

Seller’s info

CarMax Serramonte

Seller’s notes about this car

Have a question?

Price history

Consumer reviews

Most recent consumer reviews

Bought a 2021 GMC Sierra SLT used 18k on it.

No recomiendo a nadie comprar GMC Denali antes de 70000

This truck has a jerk when changing gears sometimes.

Similar cars at this dealership

Car shopper resources

2021 GMC Sierra 1500 AT4

Car shopper resources

Basics

Features

Vehicle history by AutoCheck

Seller’s info

CarMax Serramonte

Seller’s notes about this car

Have a question?

Price history

Customize your payment

Consumer reviews

Most recent consumer reviews

Bought a 2021 GMC Sierra SLT used 18k on it.

No recomiendo a nadie comprar GMC Denali antes de 70000

This truck has a jerk when changing gears sometimes.

Car shopper resources