2024 Used GMC Transmissions For Sale

41
verified 2024 GMC transmissions
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Up to 3 yrs
extended warranty available
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2024 Used GMC Transmissions For Sale

41 verified used 2024 GMC transmissions in stock — the 10L80 ten-speed across Sierra 1500, Yukon and Yukon XL, the Allison 10L1000 behind every Sierra HD, and the 9-speed transverse units in Acadia and Terrain. Every one shift-tested, VIN-matched and shipped free.

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Warranty On Every Unit
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Photos Before Shipment
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ASE-Tested & Verified
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Free Nationwide Shipping
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30-Day Money-Back
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Secure SSL Checkout

2024 GMC Transmission Families

Which gearbox sits behind which 2024 GMC, and how many of each we hold today.

Transmission family Fits (2024) In stock
10L80 10-Speed Automatic — Yukon / Yukon XL Yukon and Yukon XL, 4x2 and 4x4, behind the 3.0L Duramax, 5.3L and 6.2L V8 — the listings state 10 Speed outright. 9
Allison 10L1000 10-Speed — 6.6L L8T Gasoline Sierra 2500 HD, Sierra 3500 HD and the Denali 2500 / 3500, gasoline, 4x2 and 4x4. 6
10L80 10-Speed Automatic — 3.0L Duramax Sierra 1500 and Sierra Denali 1500 with the 3.0L inline-six turbodiesel, option codes MQB and MQC. 5
5.3L Half-Ton — 8-Speed or 10-Speed by Option Code Sierra 1500 and Sierra Denali 1500 5.3L V8. GM shipped this truck with an 8L90 or a 10L80 depending on the build; the listings carry option codes MHS and MHT, and your VIN settles which one you need. 5
8L90 8-Speed Automatic Sierra 1500 2.7L Turbo (4x2 and 4x4) and the Savana 2500 / 3500 4.3L V6. 4
Allison 10L1000 10-Speed — 6.6L Duramax Diesel Sierra 2500 HD option code MGM and the Denali 2500 / 3500 diesel. 3
9T65 9-Speed Automatic Acadia, front-wheel drive and all-wheel drive. 2
9T45 / 9T50 9-Speed Automatic Terrain, front-wheel drive and all-wheel drive. 2
6L90 6-Speed Automatic Savana 2500 and Savana 3500 with the 6.6L L8T V8 — the one 2024 GMC line still on a six-speed. 2
10L80 10-Speed Automatic — 6.2L V8 Sierra 1500 and Sierra Denali 1500 4x4 with the 6.2L L87. 2
8L80 8-Speed Automatic Canyon 2.7L Turbo, 4x4. 1
Total 41

Other GMC Model Years

Every model year we hold GMC transmissions for. Years without a link are in stock but have no year page yet — text us your VIN.

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Why Buy a 2024 GMC Transmission from Auto Power Source

A 2024 GMC is new enough that the gearbox behind it is one of GM's current-generation units, and that cuts both ways. The 10L80 ten-speed, the Allison 10L1000 on the HD trucks and the 9-speed transverse boxes in Acadia and Terrain are all electronically controlled to a degree older GM automatics never were, so a unit that physically bolts up can still behave badly if the calibration, the drive configuration or the option code is wrong. We do not sell on displacement alone. Every 2024 GMC transmission here is matched against your VIN before it is offered to you.

The half-ton is where 2024 gets genuinely confusing. A 5.3L Sierra 1500 left the factory with either an eight-speed or a ten-speed depending on the build, and the listings carry option codes — MHS, MHT, MQB, MQC — precisely because the displacement does not tell you which one is in your truck. Send us the VIN and we will tell you in writing which unit yours takes before you spend anything. Guessing here is how people end up with a gearbox that fits the bellhousing and nothing else.

Everything is shift-tested under load by ASE-certified technicians before it is listed: clean engagement in every gear, no slipping, no abnormal noise, solenoid pack and cooler lines inspected. You get multi-angle photographs for approval before the unit ships, free freight to all fifty states, a 30-day money-back window and the warranty included with every unit. If the photos are not what you expected, you do not pay.

📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →

Your 2024 GMC Transmission Options: Compared

Most 2024 GMC owners face four real choices when the transmission fails:

← Swipe sideways to see all columns →
Option Cost Reliability Warranty Fitment Match
Used OEM (this collection) $$$ Best Value High — tested Included VIN-matched
New OEM (dealer) $$$$$ 2-4× more High Manufacturer Exact
Aftermarket / Reman $$$$ Varies 6-12 mo May adapt
Junkyard $ Cheapest Unknown None DIY

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

2024 GMC Transmission Buying Guide

5 things to verify before buying a used 2024 GMC transmission:

  1. Start with the option code, not the engine. On a 2024 Sierra 1500 the engine narrows it down and nothing more — the MHS, MHT, MQB and MQC codes are what separate an eight-speed from a ten-speed. The code is on the glovebox or door-jamb RPO label.
  2. Check 4x2 against 4x4. A two-wheel-drive and a four-wheel-drive version of the same unit differ at the tailhousing and the output shaft. They are not interchangeable, and this is the single most common mismatch on GMC trucks.
  3. On an HD truck, confirm gas or diesel. The 2024 Sierra 2500 HD and 3500 HD both run an Allison ten-speed, but the gasoline 6.6L L8T and the 6.6L Duramax do not share the same unit. Option code MGM marks the diesel side.
  4. On Acadia and Terrain, confirm the drive layout. The transverse nine-speeds come in front-wheel-drive and all-wheel-drive builds with different cases and output provisions. A FWD unit will not take the AWD transfer assembly.
  5. Confirm the match with your own VIN before you order. Your VIN settles the transmission code, drivetrain and build split in one step. Text it to +1-307-441-5554 and we will confirm in writing exactly which unit fits your vehicle before you pay.

Our ASE-certified technicians verify every one of these points against your VIN before any unit ships.

📞 Need help choosing the right 2024 GMC transmission? Talk to our team live.Call 1-877-313-8995

Frequently Asked Questions

Will a 2024 GMC transmission from another model fit my truck?
Only if the option code, drive configuration and engine all line up. A 2024 Sierra 1500 ten-speed and a 2024 Yukon ten-speed can be the same family and still be different part numbers once the drive layout and calibration are accounted for. Text us the VIN and we will confirm the exact match in writing.
Is a 2024 Sierra 1500 5.3L an eight-speed or a ten-speed?
Both exist. GM built the 5.3L half-ton with an 8L90 eight-speed on some configurations and a 10L80 ten-speed on others, which is why our listings carry the MHS and MHT option codes. Your VIN is the only reliable way to settle it, and we will check it for you before you order.
What transmission is behind a 2024 Sierra 2500 HD?
An Allison 10L1000 ten-speed, on both the gasoline 6.6L L8T and the 6.6L Duramax diesel — but they are not the same unit. The diesel listings carry option code MGM. We match the donor VIN to your VIN to confirm which side you need.
Do you carry 2024 GMC Acadia and Terrain transmissions?
Yes. The Acadia runs a 9T65 nine-speed and the Terrain a 9T45 or 9T50, each in front-wheel-drive and all-wheel-drive builds. We hold both drive layouts for both models; tell us which you have, or send the VIN.
What does the warranty cover on a 2024 GMC transmission?
Every unit ships with a warranty included, and the term is confirmed in writing on your invoice before you pay. Coverage is on the internal mechanical components of the unit we supply. Installation must be done by a shop and the fluid and filter service completed at install.
Do I get to see the actual unit before it ships?
Yes, always. Our technicians photograph the specific transmission from several angles and send those photos to you for approval before anything is palletized. If you do not approve, you pay nothing — no restocking fee and no return freight charge.
How much does freight cost, and how long does it take?
Freight is free to all fifty states. A transmission is strapped to a heavy-duty wooden pallet and moves by freight carrier; most deliveries land within three to seven business days of approval, and you get tracking as soon as it is on a truck.
What do you need from me to quote a 2024 GMC transmission?
The VIN is enough. It gives us the transmission code, the drive configuration and the build split in one step. Text it to +1-307-441-5554 or call 1-877-313-8995 and we will come back with the options we actually have on the shelf.
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Every GMC transmission you buy earns rewards. 10 orders (yours or referred) = $500 cash credit. Silver, Gold, and Platinum tiers with discounts, priority support, and private inventory access.
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100K+
Engines+Transmissions In Stock
0%
fitment-related returns
All 50
states covered, free freight
36
brands covered

Our 6-Step Inspection & Shipping Process

Every 2024 GMC transmission we ship has been through these six steps:

1. VIN-Matching
We match the donor VIN to your VIN to confirm transmission code, drivetrain, and 2WD/4WD configuration.
2. Tested & Verified
ASE-certified technicians Shift-Test every gear under load. Units are checked for clean engagement, no slipping, no abnormal noises.
3. Noise & Smoke Verification
Units are run to verify normal mechanical sound and clean operation — catches internal wear static tests miss.
4. Visual Inspection
Every accessible component is inspected: bell housing, output shaft, solenoid pack, cooler lines, sensor harnesses.
5. Photograph & Catalog
Multi-angle photos sent to you BEFORE we ship for your approval.
6. Palletize & Ship
Strapped on a heavy-duty wooden pallet, shipped via freight at no charge.

Our Photos-Before-Shipment Guarantee

Before any transmission leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. On top of 30-day money-back and the warranty included with every unit. Browse all 41 2024 GMC transmissions below.

✉ Email Us at info@autopowersource.com
No match? Text VIN →