Used 2020 GMC Sierra 1500 for Sale near Ontario

How much does the 2020 GMC Sierra 1500 cost?

Prices have softened 13.62% compared to this time last year, making it a favourable time to shop this model year.

There are 480 listings available, which suggests you have a reasonable amount of inventory to compare.

Is the 2020 GMC Sierra 1500 a good car?

Generally — the 2020 GMC Sierra 1500 earns a 4.28/5 user rating, which points to strong owner satisfaction. Owners commonly praise the spacious interior, advanced technology, strong performance, smooth ride, and the wide range of options available. For you, that means this truck can make sense if you want a full-size pickup with a more upscale feel and enough flexibility to suit work, comfort, or mixed-use driving. With 34.6% of listings marked as good or great deals, there are still worthwhile opportunities if you shop carefully.

Is the 2020 GMC Sierra 1500 reliable?

Owners rate it 4.28/5, a solid signal of long-term satisfaction.

User feedback also describes this Sierra as reliable and dependable, with many owners feeling confident in its long-term ownership prospects. That said, some drivers reported engine-related concerns, including oil burning and recalls, so you should pay close attention to maintenance records and any open recall work before buying. For used shoppers, the main long-term risk is ending up with a truck that has not been properly maintained or inspected.

Is now a good time to buy a used 2020 GMC Sierra 1500?

This looks like a moderate, selective buyer’s market, so you can be choosy without expecting deep discounts on every listing.

• Deal availability: 34.6% of listings are priced as good or great deals.
• Inventory: There are 480 listings available.
• Price trend: Prices have softened 13.62% compared with last year.

If you find a listing below $36,362 CAD, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2020 GMC Sierra 1500's resale value?

The current average of $37,958 CAD sits slightly below last year's $43,942 CAD.

That softer pricing can help you buy more truck for the money today, but it also means future resale values may face some pressure if the market stays loose. If you plan to sell later, buying well matters more than usual because your eventual return will depend heavily on how much room you leave between purchase price and market average. Vehicles with solid owner satisfaction ratings, like this model year's 4.28/5, tend to retain buyer demand, which supports resale value over time.

Should I buy a 2020 GMC Sierra 1500 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:

• 34.6% of listings are priced as good or great deals.
• Price trend: Prices have softened 13.62% compared with last year.
• Owners rate it 4.28/5 — a solid satisfaction signal.

Consider the 2021 if:

• At $39,996 CAD, the 2021 costs more than the current year's $37,958 CAD average.
• It adds a carbon-fibre composite cargo bed for a more distinctive pickup setup.

The bottom line: You should start with the 2020 if you want the better value and a broader pool of discounted listings. If you are willing to spend more for a slightly newer truck with a more distinctive bed option, the 2021 is the better secondary path. For most price-sensitive buyers, though, the 2020 offers the stronger balance of market pricing and owner satisfaction.

These recommendations are based on CarGurus' proprietary market data from September 15, 2026, CarGurus experts' opinions, and generative AI.