Used 2021 GMC Sierra 1500 transmission – (AT), 4x2, 5.3L, 6 speed (opt MYC)

Year & trim-specific price guide

Used 2021 GMC Sierra 1500 Transmission — (AT), 4x2, 5.3L, 6 speed (opt MYC) prices

Trim-specific pricing for the (AT), 4x2, 5.3L, 6 speed (opt MYC) variant of the 2021 GMC Sierra 1500 transmission, built from 42 real salvage yard listings with condition grade detail.

2021 GMC Sierra 1500 · (AT), 4x2, 5.3L, 6 speed (opt MYC)

$2,450

median asking price

42 priced listings · $1,850–$3,150

Price summary

A used 2021 GMC Sierra 1500 transmission ((AT), 4x2, 5.3L, 6 speed (opt MYC)) costs $1,850 to $3,150, with a median asking price of $2,450. Based on 42 priced salvage yard listings across the US, updated Aug 8, 2026. Prices exclude shipping, core charges, and installation.

Grade A (excellent)$2,747
Grade B (good)$2,386

2021 GMC Sierra 1500 transmission — (AT), 4x2, 5.3L, 6 speed (opt MYC) price snapshot

USD
Low
$1,850
Average
$2,496
High
$3,150
42 priced listings used · last updated Aug 8, 2026· How we price·

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Reporting price for 2021 GMC Sierra 1500 Transmission ((AT), 4x2, 5.3L, 6 speed (opt MYC))

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Condition comparison

Price by part grade

Grade AClean / low wear$1,850–$3,01119 listings
Grade BStandard used$1,850–$2,73813 listings
Grade CVisible wearUpdating
Grade XUngraded$2,398–$3,15010 listings

Median by grade

Grade price comparison

Median asking price by seller-reported condition grade · $1,850–$3,150 overall range

Trim-specific context

How does the (AT), 4x2, 5.3L, 6 speed (opt MYC) compare?

This pricing covers the (AT), 4x2, 5.3L, 6 speed (opt MYC) variant of the 2021 GMC Sierra 1500 transmission, based on 42 priced listings. Its $2,450 median is 9% below 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

(AT), 4x2, 5.3L, 6 speed (opt MYC) in other model years

All years
202037 listings$2,300$1,597 – $2,800

Same year, other trims

What other 2021 GMC Sierra 1500 transmission variants are available?

(AT), 4x4, 5.3L, 8 speed transmission (opt MQE)

47 listings$3,441$1,900 – $4,527

(AT), 4x4, 2.7L

46 listings$3,448$2,800 – $5,723

(AT), 4x2, 2.7L

45 listings$2,850$1,800 – $4,414

(AT), 4x2, 5.3L, 8 speed (opt MQE)

45 listings$2,950$1,900 – $4,414

(AT), 4x2, 4.3L

44 listings$2,145$350 – $2,866

(AT), 4x4, 5.3L, 10 speed transmission (opt MQB), w/o opt NSS

43 listings$2,450$1,465 – $3,744

(AT), 4x4, 6.2L, w/o opt NSS

43 listings$2,450$1,465 – $3,744

(AT), 4x4, 4.3L

40 listings$2,091$1,200 – $3,245

(AT), 4x4, 5.3L, 6 speed transmission (opt MYC)

40 listings$3,250$2,310 – $4,450

(AT), 4x4, 5.3L, 10 speed transmission (opt MQB), opt NSS

32 listings$2,200$1,200 – $3,680

(AT), 4x4, 6.2L, opt NSS

32 listings$2,200$1,200 – $3,680

(AT), 4x4, 3.0L

30 listings$2,792$850 – $4,177

(AT), 4x2, 3.0L

5 listings$2,600$1,848 – $2,955

Back to full guide

2021 GMC Sierra 1500 transmission — all trims

View 2021 guide

Common questions

2021 GMC Sierra 1500 transmission ((AT), 4x2, 5.3L, 6 speed (opt MYC)) FAQ

How much is a used 2021 GMC Sierra 1500 transmission ((AT), 4x2, 5.3L, 6 speed (opt MYC))?

Based on 42 priced salvage-yard listings, a used 2021 GMC Sierra 1500 transmission in the (AT), 4x2, 5.3L, 6 speed (opt MYC) variant lists between $1,850 and $3,150, with a median asking price of $2,450.

Which years use the (AT), 4x2, 5.3L, 6 speed (opt MYC) transmission?

The (AT), 4x2, 5.3L, 6 speed (opt MYC) variant appears in model years 2020, 2021. Prices and availability may differ by year.