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Used truck, 2021
Live market data and proprietary AI-powered price forecasting for the 2021 GMC Sierra 1500 SLE. Updated weekly from thousands of active listings.
Current median price
$28,858
198 active listings
60-day forecast
$28,424
AI-predicted median
Expected change
-1.5%
vs. today
Confidence
81%
forecast confidence
Median days on market
102 days
last 90 days, n=372 listings
How 2021 GMC Sierra 1500 is tracking: CarCast forecasts a -1.5% move over the next 60 days. The broader used-car market is down 0.6% year-over-year (MUVVI) and down 1.5% on the consumer price index.
Median asking prices aggregated weekly from active dealer and auction listings.
We refresh the 2021 GMC Sierra 1500 SLEforecast every Sunday. We'll email you a short update whenever the median moves more than $500 or 2%.
| Week ending | Low (P10) | Expected (P50) | High (P90) |
|---|---|---|---|
| Oct 25, 2026 | $28,162 | $28,516 | $29,212 |
| Nov 1, 2026 | $27,909 | $28,439 | $29,361 |
| Nov 8, 2026 | $27,738 | $28,344 | $29,544 |
| Nov 15, 2026 | $27,633 | $28,391 | $29,737 |
| Nov 22, 2026 | $27,593 | $28,386 | $29,798 |
| Nov 29, 2026 | $27,470 | $28,333 | $29,877 |
| Dec 6, 2026 | $27,447 | $28,438 | $30,237 |
| Dec 13, 2026 | $27,344 | $28,424 | $30,382 |
Our model expects prices to stay roughly flat over the forecast window.
CarCast's AI-powered forecasting combines live listing prices, historical trends, regional economic indicators, and search-interest data to project where used car prices are heading. Informational analytics only — not financial advice.
Forecasts and trend classifications are informational analytics only and do not constitute financial advice or a recommendation to purchase, hold, or sell any vehicle. Individual market conditions vary.
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2024 · truck
2024 GMC Sierra 1500 SLE
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2023 · truck
2023 GMC Sierra 1500 SLE
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2022 · truck
2022 GMC Sierra 1500 SLE
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2020 · truck
2020 GMC Sierra 1500 SLE
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2019 · truck
2019 GMC Sierra 1500 SLE
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The forecast on this page is the public 30-day median. Dealer is $199/mo for a full lot. A 90-day forecast is not published.