Used 2021 GMC Sierra 1500 transmission – (AT), 4x4, 5.3L, 6 speed transmission (opt MYC)

Year & trim-specific price guide

Used 2021 GMC Sierra 1500 Transmission — (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) prices

Trim-specific pricing for the (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) variant of the 2021 GMC Sierra 1500 transmission, built from 40 real salvage yard listings with condition grade detail.

2021 GMC Sierra 1500 · (AT), 4x4, 5.3L, 6 speed transmission (opt MYC)

$3,250

median asking price

40 priced listings · $2,310–$4,450

Price summary

A used 2021 GMC Sierra 1500 transmission ((AT), 4x4, 5.3L, 6 speed transmission (opt MYC)) costs $2,310 to $4,450, with a median asking price of $3,250. Based on 40 priced salvage yard listings across the US, updated Aug 8, 2026. Prices exclude shipping, core charges, and installation.

Grade A (excellent)$3,000
Grade B (good)$3,027

2021 GMC Sierra 1500 transmission — (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) price snapshot

USD
Low
$2,310
Average
$3,147
High
$4,450
40 priced listings used · last updated Aug 8, 2026· How we price·

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Reporting price for 2021 GMC Sierra 1500 Transmission ((AT), 4x4, 5.3L, 6 speed transmission (opt MYC))

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Condition comparison

Price by part grade

Grade AClean / low wear$2,500–$3,5007 listings
Grade BStandard used$2,310–$3,71515 listings
Grade CVisible wearUpdating
Grade XUngraded$2,398–$4,45018 listings

Median by grade

Grade price comparison

Median asking price by seller-reported condition grade · $2,310–$4,450 overall range

Trim-specific context

How does the (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) compare?

This pricing covers the (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) variant of the 2021 GMC Sierra 1500 transmission, based on 40 priced listings. Its $3,250 median is 20% 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 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), 4x2, 5.3L, 6 speed (opt MYC)

42 listings$2,450$1,850 – $3,150

(AT), 4x4, 4.3L

40 listings$2,091$1,200 – $3,245

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

How much is a used 2021 GMC Sierra 1500 transmission ((AT), 4x4, 5.3L, 6 speed transmission (opt MYC))?

Based on 40 priced salvage-yard listings, a used 2021 GMC Sierra 1500 transmission in the (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) variant lists between $2,310 and $4,450, with a median asking price of $3,250.

Which years use the (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) transmission?

In our current dataset, the (AT), 4x4, 5.3L, 6 speed transmission (opt MYC) variant appears only for the 2021 model year.