2021 GMC Sierra 1500 transmission — (AT), 4x4, 3.0L price snapshot
- Low
- $850
- Average
- $2,680
- High
- $4,177

Year & trim-specific price guide
A used 2021 GMC Sierra 1500 transmission ((AT), 4x4, 3.0L) costs $850 to $4,177, with a median asking price of $2,792. Based on 30 priced salvage yard listings across the US, updated Aug 8, 2026. Prices exclude shipping, core charges, and installation.
Condition comparison
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $2,000–$3,000 | 7 | |
| Grade BStandard used | $1,000–$4,177 | 18 | |
| Grade CVisible wear | $850–$850 | 1 | |
| Grade XUngraded | $3,680–$3,680 | 4 |
Median by grade
Median asking price by seller-reported condition grade · $850–$4,177 overall range
Trim-specific context
This pricing covers the (AT), 4x4, 3.0L variant of the 2021 GMC Sierra 1500 transmission, based on 30 priced listings. Its $2,792 median is 3% above the 2021 GMC Sierra 1500 transmission overall median of $2,700.
There are 13 other transmission variants available for the 2021 GMC Sierra 1500.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same trim, other years
Same year, other trims
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Common questions
Based on 30 priced salvage-yard listings, a used 2021 GMC Sierra 1500 transmission in the (AT), 4x4, 3.0L variant lists between $850 and $4,177, with a median asking price of $2,792.
The (AT), 4x4, 3.0L variant appears in model years 2020, 2021. Prices and availability may differ by year.