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AutosXchange market research

2020 GMC Sierra 3500HD market value, prices & key facts

What dealers are asking for the 2020 GMC Sierra 3500HD right now, from 39 current listings at 38 dealerships across 24 states, with EPA fuel economy, NHTSA safety ratings and recalls for this model year.

Asking prices of current listings · AutosXchange live dealer listings, November 8, 2026 · not sold prices

2020 GMC Sierra 3500HD
2020 GMC Sierra 3500HD · Photo from a listing on AutosXchange
39Listings for sale now
$45,124Median asking price
$36,820–$58,792Typical range (10th–90th percentile)
106,300Median miles (39 listings with odometer)
38Dealerships listing it
See 2020 GMC Sierra 3500HD listingsAll GMC Sierra 3500HD yearsOther GMC models
In brief

2020 GMC Sierra 3500HD overview

AutosXchange has 39 listed now, with a median asking price of $45,124 and median 106,300 miles.

Composed only from U.S. government data (EPA, NHTSA) and current AutosXchange listings; not a review.
Market snapshot

2020 GMC Sierra 3500HD: the market right now

Half of the 39 listings ask between $39,088 and $51,495.

$39,08825th percentile asking price
$45,124Median asking price
$51,49575th percentile asking price
106,300Median miles (middle half 82,007–131,497)
3Listings with a price cut since first listed
38Cities with listings

New vs. used (by odometer)

New or demo (under 100 mi): 0Used (100+ mi): 39

Top cities by supply

2020 GMC Sierra 3500HD listings by cityColorado Springs, CO: 2 listings, median $38,249; Mesa, AZ: 1 listings, median $59,405; Sierra Vista, AZ: 1 listings, median $58,022; Denver, CO: 1 listings, median $57,995; Vernon, CT: 1 listings, median $45,923; Jacksonville, FL: 1 listings, median $41,914; Duluth, GA: 1 listings, median $60,995; Arco, ID: 1 listings, median $40,995.Colorado Springs, COColorado Springs, CO: 2 · median $38.2k2 · median $38.2kMesa, AZMesa, AZ: 1 · median $59.4k1 · median $59.4kSierra Vista, AZSierra Vista, AZ: 1 · median $58k1 · median $58kDenver, CODenver, CO: 1 · median $58k1 · median $58kVernon, CTVernon, CT: 1 · median $45.9k1 · median $45.9kJacksonville, FLJacksonville, FL: 1 · median $41.9k1 · median $41.9kDuluth, GADuluth, GA: 1 · median $61k1 · median $61kArco, IDArco, ID: 1 · median $41k1 · median $41k
Price cuts: listings whose current asking price is below the price first recorded by AutosXchange (0 were raised). New vs. used is read from the odometer (under 100 miles = new or demo) because most dealer feeds carry no new/used flag.
Price vs. mileage

2020 GMC Sierra 3500HD: asking price vs. mileage

On the trend line, every 10,000 more miles goes with about $1,570 lower asking price.

2020 GMC Sierra 3500HD asking price vs. mileageScatter of 37 current 2020 GMC Sierra 3500HD listings (asking price against odometer miles), with a least-squares trend line of about $-1,570 per 10,000 miles.$25k$30k$35k$40k$45k$50k$55k$60k$65k025k50k75k100k125k150k175k200kOdometer (miles)Asking price
Each dot is one current listing; the line is a straight least-squares fit over all of them. 2 extreme listings (top/bottom 1% of price or mileage) are outside the chart.
Price distribution

2020 GMC Sierra 3500HD: how asking prices are spread

Half of listings ask between $39,088 and $51,495; the most common band is $45,000–$50,000 (10 listings).

2020 GMC Sierra 3500HD asking price distributionHistogram of 39 current 2020 GMC Sierra 3500HD asking prices in 9 bins of $5,000; median $45,124.035810$20k–$25k: 1 listing (includes 1 below $20k)$25k–$30k: 2 listings$30k–$35k: 0 listings$35k–$40k: 9 listings$40k–$45k: 7 listings$45k–$50k: 10 listings$50k–$55k: 2 listings$55k–$60k: 6 listings$60k–$65k: 2 listings≤$20k$30k$40k$50k$60k$65kMedian $45,124Asking price (bar height = number of listings)
Bars count listings in $5,000 price bands; the dashed line marks the median. The outer bars also include the lowest and highest 1% of prices.
Where they are listed

2020 GMC Sierra 3500HD: listings by state (top 10)

Texas has the most, with 5 listings (13% of 39).

2020 GMC Sierra 3500HD listings by stateNumber of current 2020 GMC Sierra 3500HD listings by dealer state: Texas 5, Colorado 3, Tennessee 3, Arizona 2, Michigan 2, Montana 2, New Hampshire 2, New York 2, Oregon 2, Utah 2.TexasTexas: 5 · 13%5 · 13%ColoradoColorado: 3 · 8%3 · 8%TennesseeTennessee: 3 · 8%3 · 8%ArizonaArizona: 2 · 5%2 · 5%MichiganMichigan: 2 · 5%2 · 5%MontanaMontana: 2 · 5%2 · 5%New HampshireNew Hampshire: 2 · 5%2 · 5%New YorkNew York: 2 · 5%2 · 5%OregonOregon: 2 · 5%2 · 5%UtahUtah: 2 · 5%2 · 5%
Counts current AutosXchange listings by the selling dealer's state (24 states in total).
By trim

2020 GMC Sierra 3500HD: listings by trim (top 4)

Denali is the most-listed trim (14 listings); AT4 has the highest median asking price of these, $47,846.

2020 GMC Sierra 3500HD listings by trimDenali: 14 listings, median $45,134; SLE: 4 listings, median $37,542; SLT: 3 listings, median $43,962; AT4: 3 listings, median $47,846.DenaliDenali: 14 · median $45.1k14 · median $45.1kSLESLE: 4 · median $37.5k4 · median $37.5kSLTSLT: 3 · median $44k3 · median $44kAT4AT4: 3 · median $47.8k3 · median $47.8k
Trim is read from the listing title (the word after the model name), so it is approximate. Trims with fewer than 3 listings are not shown.
Current listings

2020 GMC Sierra 3500HD for sale now: best value first

2020 GMC Sierra 3500HD SLE for sale in Cavalier, ND38% below similar
2020 GMC Sierra 3500HD SLE$27,999153,593 mi · Cavalier, NDMCCURDY AUTO
2020 GMC Sierra 3500HD SLT for sale in Derry, NH33% below similar
2020 GMC Sierra 3500HD SLT$29,990178,000 mi · Derry, NHMotorsports Depot
2020 GMC Sierra 3500HD for sale in Olathe, KS19% below similar
2020 GMC Sierra 3500HD$36,500180,140 mi · Olathe, KSXclusive Motors
2020 GMC Sierra 3500HD AT4 for sale in Billings, MT18% below similar
2020 GMC Sierra 3500HD AT4$36,900177,134 mi · Billings, MTFull Throttle Auto and Cycles
2020 GMC Sierra 3500HD SLE for sale in Bellingham, WA18% below similar
2020 GMC Sierra 3500HD SLE$36,99973,572 mi · Bellingham, WAMB Motors
2020 GMC Sierra 3500HD for sale in Eads, TN16% below similar
2020 GMC Sierra 3500HD$37,950147,411 mi · Eads, TNTorx Truck & Trailer Sales
2020 GMC Sierra 3500HD SLE Truck V8 for sale in Colorado Springs, CO16% below similar
2020 GMC Sierra 3500HD SLE Truck V8$38,08455,299 mi · Colorado Springs, COPhil Long Ford of Motor City
2020 GMC Sierra 3500HD SLE Truck V8 for sale in Colorado Springs, CO15% below similar
2020 GMC Sierra 3500HD SLE Truck V8$38,41364,109 mi · Colorado Springs, COPhil Long Ford of Motor City
2020 GMC Sierra 3500HD Denali for sale in Cary, NC14% below similar
2020 GMC Sierra 3500HD Denali$38,956148,921 mi · Cary, NCAnchor Auto Outlet
2020 GMC Sierra 3500HD Denali 4x4 Crew Cab 6.75 ft. box 158.9 in. WB SRW for sale in Lubbock, TX13% below similar
2020 GMC Sierra 3500HD Denali 4x4 Crew Cab 6.75 ft. box 158.9 in. WB SRW$39,219117,225 mi · Lubbock, TXSpirit Chrysler Dodge Jeep Ram
2020 GMC Sierra 3500HD Denali for sale in Eugene, OR11% below similar
2020 GMC Sierra 3500HD Denali$39,990139,372 mi · Eugene, ORLithia Nissan of Eugene
2020 GMC Sierra 3500HD Denali Crew Cab 4WD for sale in Great Neck, NY9% below similar
2020 GMC Sierra 3500HD Denali Crew Cab 4WD$40,946116,565 mi · Great Neck, NYEuro Motor Haus
2020 GMC Sierra 3500HD for sale in Arco, ID9% below similar
2020 GMC Sierra 3500HD$40,995108,876 mi · Arco, IDValley View Auto
2020 GMC Sierra 3500HD Denali for sale in Jacksonville, FL7% below similar
2020 GMC Sierra 3500HD Denali$41,914122,293 mi · Jacksonville, FLCoggin Buick GMC of Orange Park
2020 GMC Sierra 3500HD SLT for sale in Bozeman, MT
2020 GMC Sierra 3500HD SLT$43,962121,871 mi · Bozeman, MTSnyder Motors Inc.
2020 GMC Sierra 3500HD Denali for sale in Ns, PA
2020 GMC Sierra 3500HD Denali$43,995141,542 mi · Ns, PAWoodcrest Motors
2020 GMC Sierra 3500HD Denali for sale in Casper, WY
2020 GMC Sierra 3500HD Denali$44,344118,875 mi · Casper, WYGreiner Ford of Casper
2020 GMC Sierra 3500HD for sale in Davison, MI
2020 GMC Sierra 3500HD$44,900126,508 mi · Davison, MISpooner Sales Inc
2020 GMC Sierra 3500HD SLT for sale in Manvel, TX
2020 GMC Sierra 3500HD SLT$45,12498,989 mi · Manvel, TXSouthFork Chrysler Dodge Jeep Ram
2020 GMC Sierra 3500HD Denali for sale in Vernon, CT
2020 GMC Sierra 3500HD Denali$45,92393,761 mi · Vernon, CTScranton GMC of Vernon
2020 GMC Sierra 3500HD Denali Crew Cab 4WD for sale in Front Royal, VA
2020 GMC Sierra 3500HD Denali Crew Cab 4WD$45,990136,486 mi · Front Royal, VAG & M Auto Sales
2020 GMC Sierra 3500HD for sale in Binghamton, NY
2020 GMC Sierra 3500HD$46,990123,069 mi · Binghamton, NYPaugh's Auto Sales
2020 GMC Sierra 3500HD Denali for sale in Park City, UT
2020 GMC Sierra 3500HD Denali$47,10393,788 mi · Park City, UTKarl Malone Chevrolet Park City
2020 GMC Sierra 3500HD AT4 for sale in Austin, TX
2020 GMC Sierra 3500HD AT4$47,84690,961 mi · Austin, TXCovert Ford
See all 39 2020 GMC Sierra 3500HD listings
Sorted by how far each asking price is below the median of the same model within one model year (all current listings nationwide). Badges show listings at least 5% below that median. Listings priced under 60% of that median (often data errors or damaged vehicles) and model years with fewer than 5 comparable listings are listed after the ranked ones.
AutosXchange Intel

2020 GMC Sierra 3500HD price activity & trends

Tracked daily since Nov 5, 2026; data as of Nov 8, 10:07 AM UTC. ▲ ▼ show the direction of change.

Latest market activity

9.6%of 52 listings had a price cut in 7 days
$593average cut, 7 days
—7-day price change from Nov 12
0 / 1new listings / removed from sale, 7 days

Since Nov 5: 9.6% of 52 listings cut (average $593), 0 new, 1 removed from sale.

Compare by location

LocationListingsMedian askingvs. nationalCut in 7 daysAvg cutSame-car 7dNew / removed 7d
United States51$46,136—9.6%$593—0 / 1

Median asking price per day

2020 GMC Sierra 3500HD: median asking price per dayUnited States: Nov 7 $45.7k, Nov 8 $46.1k$44.5k$45k$45.5k$46k$46.5k$47k$47.5kNov 7Nov 7Nov 8United States Nov 7: $45.7kUnited States Nov 8: $46.1k
Market moversMarket TrendsCompare marketsData (JSON)
Source: AutosXchange Intel Hub, autos-xchange.com/market. Asking prices of dealer listings tracked by AutosXchange since Nov 5, 2026, not sold prices; not seasonally adjusted. A market figure is published only with at least 30 listings from at least 5 dealers (no dealer above 40%). "Removed from sale" means a listing left the dealer's website; it is not a confirmed sale. Methodology
AutosXchange Intel Hub

Latest price changes: 2020 GMC Sierra 3500HD

7 cuts and 0 raises in the last 30d; median cut −1.4%.

All price changes in the AutosXchange Intel Hub →

Source: AutosXchange Intel Hub, autos-xchange.com/market, 2026-11-08.

By model year

GMC Sierra 3500HD market data by model year

Listings and median asking price per model year. Years with fewer than 5 listings link to the listings.
Shop locally

2020 GMC Sierra 3500HD for sale by city

FAQ

Frequently asked questions

What is the average asking price of a 2020 GMC Sierra 3500HD?
Across 39 current listings on AutosXchange, the median asking price of a 2020 GMC Sierra 3500HD is $45,124. Most listings (10th to 90th percentile) ask between $36,820 and $58,792. These are dealer asking prices, not sold prices.
How many GMC Sierra 3500HD are for sale?
AutosXchange currently lists 39 vehicles from 38 dealerships in 24 states.
What mileage is typical for a 2020 GMC Sierra 3500HD?
The median odometer reading is 106,300 miles; the middle half of listings show between 82,007 and 131,497 miles (39 listings with a published odometer).
What is a fair asking price for a 2020 GMC Sierra 3500HD?
Half of current listings ask between $39,088 and $51,495 (25th to 75th percentile), around a median of $45,124. Compare mileage, trim, condition and the vehicle history report before deciding; AutosXchange figures are asking prices, not sold prices.
Where are the most GMC Sierra 3500HD for sale?
Texas has the most current listings (5), followed by Colorado (3).

AutosXchange market data is calculated from the asking prices of current dealer listings on AutosXchange, refreshed as dealers update their inventory. These are not sold or transaction prices and not appraisals. Listings with an asking price under $500 (placeholder prices) are excluded. Confirm price, fees and availability with the selling dealer.