Used 2020 GMC Sierra 3500HD for Sale near Ontario
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Exterior colour:
- Silver
- Interior colour:
- Black
- Transmission:
- Automatic
- Mileage:
- 169,889
- Stock #:
- 270560
- VIN:
- 1GT49SEYXLF270560
Sponsored by Canadian Fine Motors Inc
2020 GMC Sierra 3500HD
Base Crew Cab 4WD
169,889 km
$49,998
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 401 hp 6.6L V8
- Exterior colour:
- White
- Fuel type:
- Gasoline
- Transmission:
- Automatic
- Mileage:
- 164,105
- Stock #:
- 156914
- VIN:
- 1GT49SE7XLF156914
Sponsored Listing
2020 GMC Sierra 3500HD
Base Crew Cab 4WD
164,105 km
$47,995
- Year:
- 2021
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 6.6L V8 Biodiesel
- Fuel type:
- Biodiesel
- Interior colour:
- Black
- Transmission:
- Automatic
- Mileage:
- 87,976
- Stock #:
- P3317A
- VIN:
- 1GT49WEY7MF248838
2021 GMC Sierra 3500HD
Denali Crew Cab 4WD
87,976 km
$73,136
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Exterior colour:
- Silver
- Interior colour:
- Black
- Transmission:
- Automatic
- Mileage:
- 169,889
- Stock #:
- 270560
- VIN:
- 1GT49SEYXLF270560
2020 GMC Sierra 3500HD
Base Crew Cab 4WD
169,889 km
$49,998
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Engine:
- 401 hp 6.6L V8
- Exterior colour:
- White
- Fuel type:
- Gasoline
- Transmission:
- Automatic
- Mileage:
- 164,105
- Stock #:
- 156914
- VIN:
- 1GT49SE7XLF156914
2020 GMC Sierra 3500HD
Base Crew Cab 4WD
164,105 km
$47,995
- Year:
- 2020
- Make:
- GMC
- Model:
- Sierra 3500HD
- Body type:
- Pickup Truck
- Doors:
- 4 doors
- Drivetrain:
- Four-Wheel Drive
- Exterior colour:
- Black
- Transmission:
- Automatic
- Mileage:
- 25,136
- Stock #:
- A1260
- VIN:
- 1GT49WEY6LF227848
2020 GMC Sierra 3500HD
Denali Crew Cab 4WD
25,136 km
$78,000
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CarGurus Analysis: 2020 GMC Sierra 3500HD
Summary
With 59 currently listed for sale and an average price of $61,087 CAD, 33.9% of 2020 GMC Sierra 3500HDs for sale on CarGurus are rated as good or great deals.
Favourably reviewed: Owners rated the 2020 GMC Sierra 3500HD 5 / 5 stars.
100.0% of 2020 Sierra 3500HD models on CarGurus are accident free.
Why it stands out
The 2020 GMC Sierra 3500HD stands out as a heavy-duty truck that was redesigned to look and work bigger without losing its familiar GMC identity. It debuted as a 2020 model, grew by as much as 25 centimetres in length and 6 centimetres in height, and gained a slightly larger, blockier grille. More importantly, GMC said the new model made significant improvements to its maximum towing capacity, which increased by 53 percent in its most extreme case.
What makes this truck especially appealing is the breadth of its capability and configuration choices. Buyers could choose a regular cab, an extended cab, or a crew cab, along with either a 6’10” short bed or an 8’2” long bed, and could also select single- or dual-wheel rear axle setups. Two engines were offered: a 6.6-litre V8 with 401 horsepower and 464 pound-feet of torque, or a 6.6-litre Duramax turbodiesel V8 with 445 hp and 910 lb-ft of torque. At its maximum, the Sierra 3500HD could haul 3,375 kilograms and tow up to 16,100 kilograms, though those figures required the diesel engine, a single cab body, rear-wheel drive, a gooseneck hitch, and dual rear wheels.
The 2020 Sierra 3500HD also brought a wide spread of trims, from a basic work-focused model to luxury and off-road variants. Standard equipment on the base truck included a seven-inch infotainment touchscreen, Apple CarPlay and Android Auto, while higher trims added features such as trailering assist, leather upholstery, a Bose premium audio system, a head-up display, surround-view cameras, and, at the top end, premium touches like power-retracting running boards, cooled and massaging front seats, and a sunroof. Its main drawbacks are the same ones that often come with a truck of this size: it can be unwieldy in parking lots, top trims can be prohibitively expensive, and rivals typically can tow more.
Other model years to consider
- Average price: $82,138 CAD
- Good/great deal percentage: 28.5%
- User rating: 5 / 5
- Total listings: 207
- Average price: $92,891 CAD
- Good/great deal percentage: 34.1%
- User rating: 5 / 5
- Total listings: 179
- Average price: $74,245 CAD
- Good/great deal percentage: 25.4%
- User rating: Not available
- Total listings: 169
This analysis is based on CarGurus' proprietary market data from September 14, 2026, CarGurus experts' opinions, and generative AI.
5.0 Overall rating
Filter by rating
Christine A
Reviewed a 2020 GMC Sierra 3500HD on Jun 16, 2023
Besides the bells and whistles we grabbed this dually because we pull a toy hauler. We went from a sturdy 2500 Dodge Ram to this beauty. We choose the dually 3500 due to the pulling capacity and payload as toy haulers are heavier in front to compensate for the weight that you can put in the back. We have no issues pulling it now and the truck does not squat because the support of the 4 tires. Other friends have regular 3500 and still have issues with the payload and had to put in more money into their vehicle to beef up the suspension when pulling a toy hauler because the payload is less. YOU WONT REGRET BUYING ONE!
Dwayne M
Reviewed a 2020 GMC Sierra 3500HD on Jan 2, 2022
The 2020 GMC Sierra 3500 HD is a great truck and investment. This truck is well built and drives great and is very comfortable to ride in. Plus has great looks.
bill z
Reviewed a 2020 GMC Sierra 3500HD on Oct 18, 2020
better than ford or ram, hard to beat gmc track record
Anonymous
Reviewed a 2020 GMC Sierra 3500HD on Jul 2, 2021
It is missing a CD player. The lumbar support needs more better adjustment.
2020 GMC Sierra 3500HD Trims
| Trim type | MSRP |
|---|---|
| Base LB 4WD | $39,800 |
| SLT Crew Cab 4WD | $56,800 |
| AT4 Crew Cab 4WD | $59,500 |
| Base Crew Cab 4WD | $44,200 |
| SLE Crew Cab 4WD | $48,200 |
| Denali Crew Cab 4WD | $65,500 |
2020 GMC Sierra 3500HD Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2020 GMC Sierra 3500HD prices has changed over time.
See more price trendsHow much does the 2020 GMC Sierra 3500HD cost?
| Metric | Value |
|---|---|
| Current Average Price | $60,746 CAD |
| Year-Round Low | $57,161 CAD |
| Year-Round High | $65,744 CAD |
| Average Price a Year Ago | $64,290 CAD |
| Change vs. Last Year | −5.51% |
Prices have softened 5.51% compared to this time last year, making it a favourable time to shop this model year.
There are 56 listings available, which gives you a reasonable amount of choice if you're comparing trims, cab styles, and bed lengths.
Is the 2020 GMC Sierra 3500HD a good car?
Yes — the 5/5 user rating points to strong owner satisfaction. Owners consistently praise its impressive performance when pulling heavy loads, along with a comfortable and well-built cabin. The broad configuration range also makes it appealing if you want a truck that can be tailored to work duties or more everyday use. With 21.4% of listings marked as good or great deals, you have some room to shop selectively.
Is the 2020 GMC Sierra 3500HD reliable?
Owners rate it 5/5, a strong signal of long-term satisfaction.
The owner feedback also points to a reliable, dependable truck that many buyers feel confident counting on for heavy-duty use. That said, used-truck ownership still comes with the usual long-term risk of wear from towing, hauling, and hard use, so condition and maintenance history matter.
Is now a good time to buy a used 2020 GMC Sierra 3500HD?
This looks like a moderate, selective buyer's market, so you can shop carefully without expecting every listing to be a bargain.
- Deal availability: 21.4% of listings are priced as good or great deals.
- Inventory: There are 56 listings available.
- Price trend: Prices have softened 5.51% compared with last year.
If you find a listing below $57,161 CAD, that's toward the low end of the year-round range and worth acting on quickly.
What is the 2020 GMC Sierra 3500HD's resale value?
The current average of $60,746 CAD sits slightly below last year's $64,290 CAD.
That kind of decline suggests future sellers may need to price competitively if they want to move the truck quickly. It also means today's buyers are entering at a lower point than they would have a year ago, which can help support value if the truck remains in strong condition. Because demand tends to stay healthier for well-regarded heavy-duty trucks, a clean example with good maintenance records should hold up better than one with visible wear.
Vehicles with strong owner satisfaction ratings, like this model year's 5/5, tend to retain buyer demand, which supports resale value over time.
Should I buy a 2020 GMC Sierra 3500HD or consider a different year?
If you're weighing the 2020 against nearby model years, here's how to think about it:
Choose the 2020 if:
- 21.4% of listings are priced as good or great deals.
- Price trend: Prices have softened 5.51% compared with last year.
- Owners rate it 5/5 — a strong satisfaction signal.
The bottom line: If you want the first year of this redesigned heavy-duty truck and value strong owner satisfaction, the 2020 is the primary year to target. If you're especially price-sensitive, it can also make sense to compare it with nearby years to see whether a lower asking price outweighs the appeal of this model year's strong market position.
These recommendations are based on CarGurus' proprietary market data from September 11, 2026, CarGurus experts' opinions, and generative AI.
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