2020 GMC Sierra 1500 Depreciation
A 6-year-old 2020 GMC Sierra 1500 has lost about 33.1% of its roughly $50,500 original value. In the 2026 source cohort, it typically listed for around $34,086, with most listings between $29,277 and $39,999. Listed examples average 88,522 miles.

2020 GMC Sierra 1500 Price by Mileage
What buyers actually pay at different odometer readings.
How Mileage Affects 2020 GMC Sierra 1500 Price
Each dot is a real listing — price plotted against odometer reading.
| Mileage | Median price | Listings |
|---|---|---|
| 30k–50k mi | $41,145 | 15 |
| 50k–75k mi | $38,221 | 53 |
| 75k–100k mi | $35,215 | 69 |
| 100k–130k mi | $32,327 | 48 |
| Over 130k mi | $28,145 | 19 |
What's a Good Price for a 2020 GMC Sierra 1500?
Great deal
Under $32,031
Typical
$32,031–$38,372
Overpriced
Above $38,372
Based on the middle 50% of listings — always adjust for mileage and condition.
Price Spread
Range across 208 listings.
Half of all listings fall between $32,031 and $38,372, with a median of $35,105.
Ownership & Condition
Across 208 2020 GMC Sierra 1500 listings.
Accident-free
66.7%
One-owner
33.3%
Avg owners
2.3
Personal use
33.3%
Certified (CPO)
3.8%
CPO premium
+$1,050
2020 GMC Sierra 1500 Efficiency & Specs
EPA fuel-economy and powertrain data.
Combined
20 MPG
City / Hwy
18 / 24
Fuel / year
$3,450
Fuel
Diesel
Engine
3.0L 6-cyl
EPA class
Standard Pickup Trucks 2WD
Depreciation by Trim
See how each 2020 GMC Sierra 1500 trim holds its value.
How the 2020 GMC Sierra 1500 Compares to Other Years
At 33.1% depreciation, the 2020 GMC Sierra 1500 sits among its neighbors on the depreciation curve. The one-year-newer 2021 has lost 31.6% (around $35,689), so stepping up a model year costs roughly $1,603 more. The older 2019 sits at 38.5% (around $32,858), so dropping back a year saves about $1,228. Buying one model year newer or older is one of the easiest ways to trade purchase price against age and remaining warranty.
Safety Ratings
NHTSA crash test ratings for the 2020 GMC Sierra 1500.
Known Issues & Complaints
433 NHTSA complaints, 12 recalls reported.
ENGINE
142 complaintsMy 2020 GMC Sierra 1500 Denali with L87 6.2L V8 suffered a catastrophic, silent seizure at 108,000 miles. Driving at highway speeds, warning light stating shift to neutral and press start, engine completely shut off and would not turn back
POWER TRAIN
82 complaintsThe contact owns a 2020 GMC Sierra 1500. The contact stated that upon taking the vehicle to the dealer for a transmission fluid flush and refill, the contact was informed that the transmission was inoperable, and the vehicle could not be dr
ELECTRICAL SYSTEM
50 complaintsFire started under passenger side front seat dashboard when rear defrost was turned on.
STEERING
37 complaints- THE GROUND STRAP CORRODED AND BROKE APART. YES, I HAVE THE GROUND CABLE THAT FAILED, IF NEEDED FOR INSPECTION. - YES!!! THE TRUCK'S STEERING KEPT GOING IN AND OUT OF MANUAL STEERING AND THE ENGINE REDUCED IN SPEED ALLOWED, AND THEN THE EN
SERVICE BRAKES
24 complaintsThe brakes suddenly activate and cause the vehicle to rapidly stop with no warning of any kind and without any braking action being taken by the driver. Then, the brakes do not release and the vehicle cannot be moved as the brakes remain on
UNKNOWN OR OTHER
21 complaintsTransmission 10l80 stuck solenoid truck has hesitation delayed shifting. And will not shift after certain gears.
Top Issues
- ENGINE
- POWER TRAIN
- ELECTRICAL SYSTEM
- STEERING
- SERVICE BRAKES
Buyer Red Flags
- !Recall 21V115000 (TIRES): General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT4, XT5, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, Traverse, GMC Yukon, Yukon XL, 2018-2021 Chev
- !Recall 19V888000 (ELECTRICAL SYSTEM): General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. The battery positive (B+) cable rings may have been manufactured with ex
- !Recall 20V792000 (SEAT BELTS): General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Sil
- !Recall 20V684000 (TIRES): General Motors LLC (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5, GMC Acadia and Chevrolet Traverse vehicles and 2020-2021 Chevrolet Silverado 1500, GMC Sierra 1500 ve
2020 GMC Sierra 1500 Listings
Real 2020 Sierra 1500 listings on the market now.

$37,197
Certified2020 Denali · Onyx Black
74,335 mi · Washington, MI
View listing →

$29,789
Certified2020 SLT · Summit White
101,284 mi · Pauls Valley, OK
View listing →

$32,580
2020 Elevation · White
28,897 mi · Graniteville, SC
View listing →

$38,775
2020 Elevation · Silver
29,949 mi · Parkersburg, WV
View listing →

$41,932
Certified2020 SLT · Silver
39,382 mi · Spearfish, SD
View listing →

$33,499
2020 SLT · Black
44,010 mi · Oak Creek, WI
View listing →
Live dealer listings, refreshed periodically. Prices and availability change.
Frequently Asked Questions
How much is a 2020 GMC Sierra 1500 worth?
A 2020 GMC Sierra 1500 is typically worth around $34,086, with most listings falling between $29,277 and $39,999. The single biggest swing factor is mileage — listed examples average about 88,522 miles, and each additional 10,000 miles shaves a few percent off the price. Condition, accident history, trim, and how many owners a car has had move the number from there. Treat the median as a fair starting point and adjust up for a clean, low-mileage, one-owner car or down for higher mileage and any reported damage.
How much has the 2020 GMC Sierra 1500 depreciated?
The 2020 GMC Sierra 1500 has lost about 33.1% of its original $50,500 base MSRP — roughly $16,716 in value, after adjusting listing prices to typical mileage for the age. Most of a car's lifetime depreciation happens in its earliest years, so a vehicle of this age has usually weathered the steepest part of the curve already. That's what makes a well-kept example at this age an efficient buy: you let the original owner absorb the fastest depreciation, then enjoy a much slower decline from here.
How many miles does a used 2020 Sierra 1500 have?
Listed 2020 Sierra 1500s average about 88,522 miles, with most between 59,045 and 118,044. As a rule of thumb, "average" mileage for any car is roughly 12,000 miles per year of age, so compare a specific listing against that benchmark. A below-average odometer commands a premium and an above-average one a discount, but a higher-mileage car with complete service records and one owner can be a better buy than a low-mileage car with gaps in its history. Consistent maintenance does more for a car's remaining lifespan than a low number on the odometer alone.
Is a certified 2020 Sierra 1500 worth the extra cost?
Certified pre-owned 2020 Sierra 1500s sell for roughly $1,050 more than comparable non-certified examples. In exchange you get a manufacturer-backed multi-point inspection, a reconditioning standard, and an extended warranty that can outlast the original coverage. Whether it's worth it depends on how long you'll keep the car: on a vehicle you plan to own for years the warranty often pays for itself, while on a short-term purchase the premium is harder to justify and a trusted independent inspection may give you most of the peace of mind for less.
What is a good price for a 2020 GMC Sierra 1500?
For a 2020 GMC Sierra 1500, anything under $32,031 is a strong deal, $32,031 to $38,372 is the typical range where most cars trade, and above $38,372 is on the expensive side — those higher prices usually buy lower mileage, a certified warranty, or a premium trim. Always weigh the asking price against the car's specific mileage and condition rather than the sticker alone: a slightly higher price for a clean, one-owner, accident-free example is often money well spent. And treat a listing priced well below the range as a prompt to dig deeper — unusually cheap cars almost always have a reason, whether it's high mileage, accident history, or a branded title.
Methodology
Figures for the 2020 GMC Sierra 1500 are computed from 150 real used-car listings. Each asking price is normalized to a standard 12,000 miles per year for the car's age, adjusted by a 5% asking-to-sale estimate, and compared against the original base MSRP for that VIN's trim. Full methodology. Updated August 2026.