$4,034 lower median
2021 Chevrolet Silverado
All trims
$30,995Median asking price · 7,522 qualifying listings
Middle 50%$26,995–$35,995
Find listings on VehiSales ↗Actual Work Truck listing photo; individual equipment may differ.
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2021 GMC Sierra
VIN
3GTP9AEH1MG166375
Market price for this build
$18,999
7 comparable listings
No longer listed since around Sep 7, 2026
Last listed by CarMax Frederick · Frederick, MD
- Last asking price
- $33,998
- Odometer
- 27,863 mi
- On the market
- 4 months
Get the history report — $9.99
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See similar cars for sale ↓ Compare with other brands ↓The date is when the listing came down — the final sale price isn't public. Prices further down describe the market for this build, not this car.
Last listed by CarMax Frederick
5601 Urbana Pike, Frederick, MD 21704
Hours
- Mon–Fri
- 10:00 AM – 9:00 PM
- Sat
- 9:00 AM – 9:00 PM
They no longer list this VIN, but may have a similar one — worth a call.
Contact details come from the dealer's listing and public business records. VinAssessment is not the seller and takes no fee — you deal with the dealer directly.
Inside your report
VIN report
2021 GMC Sierra
VIN 3GTP9AEH1MG166375
Accidents
Reported damage & accident records
Title
Salvage, flood & other title brands
Mileage
Recorded odometer readings
Listings
Past prices, dealers & listing photos
Section preview · Results shown in the full report
Market price range
Based on 7 comparable same-build listings — a small sample, treat the band as a rough guide · Market data as of November 12, 2026Below market
$18,078
Middle of range
$18,999
Above market
$28,480
THE SMARTER NEXT STEP
Love this car? See what else is out there.
2021 GMC Sierra for sale near FrederickMD
45 cheaper within 50 miles · best $18,100 less
1 same trim
from $16,800
▼ $17,198 less
Glen Burnie
4 from 2020–2022, same body
from $15,898
▼ $18,100 less
Winchester
24 one trim down
from $22,751
▼ $11,247 less
Fairfax
See all 96 cars near you →
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Vehicle locations appear when available.
Price history for this VIN
Sep 1, 2026 · $33,998
Sep 3, 2026 · $33,998
Asking prices recorded across 2 listing dates for VIN 3GTP9AEH1MG166375, spanning 2 days.
Listings
Full listing history on VehiSales →No active listings of this exact VIN right now.
Former listings
| Dealer | Location | Price | Mileage | Listed | Seen |
|---|---|---|---|---|---|
| CarMax Frederick | Frederick, MD 21704 | $33,998 | 27,863 mi | 2026-09-03 | 66 d ago |
| CarMax Gaithersburg | Frederick, MD 21705 | $33,998 | 27,863 mi | 2026-09-01 | 66 d ago |
| CarMax Westborough | Westborough, MA 1581 | $33,998 | 27,845 mi | 2026-08-12 | 85 d ago |
| CarMax North Attleboro | North Attleborough, MA 2760 | $35,998 | 27,796 mi | 2026-06-24 | 120 d ago |
| CarMax North Attleboro | North Attleboro, Massachusetts 02760 | $33,998 | 27,796 mi | 2026-05-07 | 120 d ago |
Decoded from the VIN
NHTSA build data for 3GTP9AEH1MG166375Engine
Drivetrain
4WD/4-Wheel Drive/4x4
Body
Pickup
Fuel
Gasoline
Doors
4
Model year
2021
Made by
GENERAL MOTORS LLC
Full factory specs for this build →
- ✗ Backup camera
- ✗ Blind-spot monitor
- ✗ Lane departure
- ✗ ABS
- ✗ Electronic stability
Fuel economy (EPA)
Combined
26
MPG
City
23
MPG
Highway
30
MPG
$1,790
/yr est. fuel
Assumes 15,000 miles a year at $3.10/gallon and 26 MPG combined.
5-year cost to own
Beyond the sticker: what this 2021 GMC Sierra likely costs over five years at 15,000 mi/yr.
Depreciation
$6,685
Fuel
$8,950
Insurance
$8,200
Maintenance & repairs
$3,750
Total, 5 years
$27,585
Estimate — insurance and taxes vary by driver and state.
Model-level data for the 2021 GMC Sierra from EPA fueleconomy.gov, refreshed October 26, 2026.
Where the price is heading
Typical asking price for a 2021 GMC Sierra over the last 6 months — the market softened $1,518 in that span.
Jun
Jul
Aug
Sep
Oct
Nov
Monthly price table
| Month | Typical price |
|---|---|
| June 2026 | $36,500 |
| July 2026 | $36,990 |
| August 2026 | $35,999 |
| September 2026 | $35,989 |
| October 2026 | $34,990 |
| November 2026 | $34,982 |
A little comparison goes a long way
About this comparison ↓What else could you drive?
Compare 2021 GMC Sierra with other models from the same year. Choose the trims that matter to you.
As of November 12, 2026, among same-year alternatives to the 2021 GMC Sierra in this catalog, the 2021 Nissan Titan has the lowest median asking price ($28,392, 481 listings with photos) and the 2021 Toyota Tundra the highest ($37,499, 700 listings).
Comparison catalog · Snapshot November 12, 2026, 05:00 UTC · Only listings with photos. This sample is separate from the price overview above and its figures differ.
Your comparison starting point
2021 GMC Sierra
All trims · United States
$35,029Comparison catalog median · 4,332 listings with photos in the comparison sample
This VIN is not in the filtered catalog sample. Comparisons use the model median when available.
Middle 50%: $30,900–$40,220
Explore this model’s prices →Explore the alternatives
Change trims, mileage or location →
$3,534 lower median
2021 Ford F-150
All trims
$31,495Median asking price · 5,025 qualifying listings
Middle 50%$26,985–$36,499
Find listings on VehiSales ↗Actual XLT Supercrew RWD listing photo; individual equipment may differ.
$5,491 lower median
2021 Ram 1500
All trims
$29,538Median asking price · 5,213 qualifying listings
Middle 50%$25,145–$34,160
Find listings on VehiSales ↗Actual several trims listed listing photo; individual equipment may differ.
$6,637 lower median
2021 Nissan Titan
All trims
$28,392Median asking price · 481 qualifying listings
Middle 50%$23,988–$32,695
Find listings on VehiSales ↗Actual Crew Cab listing photo; individual equipment may differ.
$2,470 higher median
2021 Toyota Tundra
All trims
$37,499Median asking price · 700 qualifying listings
Middle 50%$32,976–$44,150
Find listings on VehiSales ↗Actual Platinum Grade listing photo; individual equipment may differ.
Compare prices side by side
| Model / trim | Median | Middle 50% | Listings |
|---|---|---|---|
| 2021 GMC Sierra All trims | $35,029 | $30,900–$40,220 | 4,332 |
| 2021 Chevrolet Silverado All trims | $30,995 | $26,995–$35,995 | 7,522 |
| 2021 Ford F-150 All trims | $31,495 | $26,985–$36,499 | 5,025 |
| 2021 Ram 1500 All trims | $29,538 | $25,145–$34,160 | 5,213 |
| 2021 Nissan Titan All trims | $28,392 | $23,988–$32,695 | 481 |
| 2021 Toyota Tundra All trims | $37,499 | $32,976–$44,150 | 700 |
What these prices mean
Only catalog listings with photos are included. Trim names do not verify equivalent equipment. Prices are asking prices, not completed sales. Alternatives share the body style and class of the source model; the nearest model years are used when the same year has too few listings. Price differences are not a valuation adjustment or guaranteed savings.
Snapshot: November 12, 2026, 05:00 UTC. 18 source listings excluded by statistical price screening; this does not verify that every deposit or payment ad has been removed.
VehiSales opens in a new tab with the model, year and known mileage range. Confirm trim, fuel, drivetrain, condition and location on VehiSales; its live inventory may differ.
Market by model year
Gen 4 · 2019–2021What each model year costs right now — live supply, median asking price and how much value each year keeps versus the newest one.
| Year | Units for sale | Median price | vs newest | Avg mileage |
|---|---|---|---|---|
| 2021 | 5,100 | $35,080 | 100% | 85,910 mi |
| 2020 | 3,770 | $34,309 | 98% | 94,781 mi |
| 2019 | 2,164 | $30,492 | 87% | 98,563 mi |
Units for sale — listings of each model year in the latest nightly market snapshot.
