Used 2020 GMC Sierra 1500 for Sale nearOakville, ON

How much does the 2020 GMC Sierra 1500 cost?

Prices have softened 11.25% compared to this time last year, making it a favourable time to shop this model year.

There are 500 listings available, which suggests you should 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 range of available options. For you, that means this truck fits well if you want a full-size pickup that blends capability with a more polished, near-luxury feel. With 31.8% of listings marked as good or great deals, there is still some room to shop selectively.

Is the 2020 GMC Sierra 1500 reliable?

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

The owner feedback also describes it as reliable and dependable, with many drivers feeling confident in its long-term use. That said, some owners reported engine-related concerns, including oil burning and recalls, so you should pay close attention to service records and any completed repairs. For used buyers, that means the truck can be a sensible long-term choice, but only if you verify maintenance history carefully.

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 shop with some leverage if you stay disciplined.

• Deal availability: 31.8% of listings are priced as good or great deals.
• Inventory: There are 500 listings available.
• Price trend: Prices have softened 11.25% compared with last year.

If you find a listing below $36,410 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 $38,388 CAD sits slightly below last year's $43,252 CAD.

That decline suggests the market has become more favourable for buyers, but it also means future sellers may need to price more competitively to stand out. If you buy at the right number now, you may have a better chance of limiting depreciation pressure later. The truck’s broad appeal and strong owner satisfaction should help support demand, especially for well-equipped examples in good condition.

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:

• 31.8% of listings are priced as good or great deals.
• Price trend: Prices have softened 11.25% compared with last year.
• Owners rate it 4.28/5 — a solid satisfaction signal.

Consider the 2021 if:

• At $39,770 CAD, the 2021 costs more than the current year's $38,388 CAD average.
• It adds an optional carbon-fibre composite cargo bed.

The bottom line: The 2020 is the better starting point if you want stronger value and a wider pool of listings to compare. If you are price-sensitive, the 2020 makes more sense; if you want the newer-year feature set and do not mind paying more, the 2021 is worth a look.

These recommendations are based on CarGurus' proprietary market data from September 29, 2026, CarGurus experts' opinions, and generative AI.