Used 2020 GMC Sierra 1500 for Sale nearNewmarket, ON

How much does the 2020 GMC Sierra 1500 cost?

Prices have softened 11.57% compared to this time last year, making it a favourable time to shop this model year.

There are 510 listings available, which suggests you have a reasonable amount of inventory to compare.

Is the 2020 GMC Sierra 1500 a good car?

Generally — the 4.28/5 user rating points to strong owner satisfaction. Owners consistently praise the spacious interior, advanced technology, strong performance, smooth ride, and the range of options available. That fits a truck aimed at buyers who want a full-size pickup with a more upscale feel and broad configuration choices. With 32.7% of listings marked as good or great deals, you still have 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 points to a truck that many drivers find dependable and trouble-free enough to recommend, especially for buyers who want a vehicle they can count on over time. At the same time, some owners reported engine-related concerns, including oil burning and recalls, so a careful used-buying inspection matters.

For used buyers, the long-term ownership risk looks manageable, but you should verify maintenance history and check for any unresolved issues before you commit.

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 patient.

• Deal availability: 32.7% of listings are priced as good or great deals.
• Inventory: There are 510 listings available.
• Price trend: Prices have softened 11.57% compared with last year.

If you find a listing below $36,374 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 $38,114 CAD sits slightly below last year's $43,099 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 less downside risk than someone who purchased when prices were higher. The truck’s broad appeal and strong owner satisfaction should help support demand when it’s time to sell.

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:

• 32.7% of listings are priced as good or great deals.
• Price trend: Prices have softened 11.57% compared with last year.
• Owners rate it 4.28/5 — a solid satisfaction signal.

Consider the 2021 if:

• At $39,683 CAD, the 2021 costs more than the current year's $38,114 CAD average.
• It adds an optional carbon-fibre composite cargo bed.

The bottom line:
Choose the 2020 if you want the better value and a wider chance of finding a deal. If you’re willing to pay more for a newer model-year alternative with a few added touches, the 2021 is the secondary path to consider.

These recommendations are based on CarGurus' proprietary market data from October 6, 2026, CarGurus experts' opinions, and generative AI.