4
verified units in stock
2020 Used Chevy Blazer Transmissions For Sale
Four verified 2020 Chevy Blazer transmissions are on the shelf today, spread across three displacements — the 2.0L, the 2.5L and the 3.6L — and every one of them an automatic. Each is VIN-matched to your Blazer, shift-tested under load by ASE-certified technicians and photographed before it ships, backed by up to a 3-year warranty and 30-day money-back. Free freight, all fifty states.
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Shift-Tested & Verified
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Free Nationwide Shipping
2020 Blazer Transmission Fitments In Stock
All 4 in-stock 2020 Blazer transmission fitments, one card per build. This is not a tidy grid — the three displacements are not each held both ways, so the shortlist depends on which engine you start from. Read the cards, then let the VIN confirm it at the order step.
Need a different part for the same car? 2020 Chevy Blazer engines are stocked separately, or step back up to all 2020 Chevy transmissions.
Why Buy a 2020 Chevy Blazer Transmission from Auto Power Source
Every gearbox on this page came out of a low-mileage 2020 Blazer donor, was logged against that vehicle's VIN the day it arrived, and has sat in a climate-controlled warehouse rather than out in the weather. None has been rebuilt or reshelled — it is the original Chevy hardware. Before any unit is listed, our ASE-certified technicians take it through its full gear range and then put it on the road with weight behind it; anything that slips, flares or hunts goes back on the rack instead of onto a pallet.
The Blazer is worth a second look before you order, because its lineup is lopsided in a way that catches people out. Three displacements, but they are not each stocked in both drivetrains: the 2.0L we hold front-drive and all-wheel-drive, the 3.6L only all-wheel-drive today, and our 2.5L listing names no drivetrain at all. So "2020 Blazer, automatic" does not narrow to one box, and the badge on the tailgate will not finish the job either. Text us the VIN and we will tell you exactly which of the four you need — or tell you honestly that we need to source it.
📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →
Your 2020 Blazer Transmission Options: Compared
When the transmission lets go on a 2020 Blazer, there are four ways forward. The honest version:
← Swipe sideways to see all columns →
| Option |
Cost |
Reliability |
Warranty |
Fitment Match |
| Used OEM (this collection) |
$$$ Best Value |
High |
Up to 3 years |
VIN-matched |
| New OEM (dealer) |
$$$$$ 2-4× more |
High |
Manufacturer |
Exact |
| Aftermarket / Reman |
$$$$ |
Varies |
6-12 mo |
May adapt |
| Junkyard |
$ Cheapest |
Unknown |
None |
DIY |
Tested used OEM is where the value lands — factory hardware with a real warranty behind it, and none of the dealer markup on a new-in-box unit.
2020 Blazer Transmission Buying Guide
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Pin the displacement first. Three are in play on this car — 2.0L, 2.5L and 3.6L. That is one more than most of the 2020 Chevy shelf, so the first cut matters more here than usual.
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Do not assume your engine comes both ways. Only the 2.0L is currently stocked in front-wheel and all-wheel drive. The 3.6L we hold in all-wheel drive today, and the 2.5L listing carries no drivetrain qualifier — which is exactly why we ask for the VIN rather than guessing.
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Never put an AWD unit in a front-drive car. The two builds part company at the output and the transfer interface. They are different parts no matter how well the engine badge matches.
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Trim will not answer this for you. The badge on the back does not pin the drivetrain on this car, and it does not pin the displacement either. Order off the VIN, not off the trim.
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Ask us for the donor VIN. We release it on request for any Blazer transmission in stock, so you can check mileage and history yourself rather than taking our word for it.
Our ASE-certified technicians verify every one of these points against your VIN before any transmission ships.
📞 Not sure which engine or drivetrain your Blazer left the line with? Talk to our team live, 24h Mon-Sat.Call 1-877-313-8995
Frequently Asked Questions
What is the warranty on a 2020 Blazer transmission?
Up to 3 years, depending on the specific unit. The exact term is shown on each product page.
What does shift-tested mean?
ASE-certified technicians run the unit through its full gear range under load and check for slip, flare and harsh engagement before it is cleared for sale.
How long until delivery?
Prep and ship time is 3-5 business days. Transit time is 2-3 business days via freight carrier after dispatch.
Can I see photos before I buy?
Yes. Multi-angle photos of the actual unit are sent before payment.
Do I need my VIN?
On this car, effectively yes. Three displacements are in play and they are not each stocked in both drivetrains, so the VIN is the only thing that reliably lands you on one unit.
What if I do not approve the photos?
Every dollar back — no restocking fees, no return freight charges.
Why is this cheaper than a dealer replacement?
It is used OEM out of a low-mileage donor Blazer — the same Chevy engineering, minus the new-part markup.
When can I reach customer service?
24 hours a day, Monday through Saturday.
46,000+
engines + transmissions shipped
0%
fitment-related returns
All 50
states covered, free freight
Excellent
Customer Reviews
rated on Trustpilot
Our 6-Step Inspection & Shipping Process
No 2020 Blazer transmission is offered for sale until it has cleared all six:
1. VIN-MatchingWe read your VIN to settle which of the three displacements your Blazer carries and how many wheels it drives — the two facts that decide the unit.
2. Tested & VerifiedASE-certified technicians shift-test the unit through its full gear range, watching for slip, flare and harsh engagement.
3. Shift & Road VerificationDriven with weight behind it. A converter that is on its way out will idle quietly all day and only give itself away under load.
4. Visual InspectionCase, bellhousing, pan, cooler lines, harness connectors and every mounting point go under the light.
5. Photograph & CatalogMulti-angle photos reach your inbox BEFORE the freight is booked. Your approval is what moves the pallet.
6. Palletize & ShipStrapped to a heavy-duty wooden pallet and freighted to your door at no charge.
What Our Customers Say
Rated Excellent by our customers on Trustpilot.
★★★★★
Transaction was perfect
"Found me the right engine at a great price. Got it in 2 days and installed the car the next day. Runs absolutely beautiful."
— Kevin Graham, 2026-04-29
★★★★★
Repeat customer
"AutoPowerSource is a great company. I've used them several times for used motors. Low mileage when other companies gave up."
— Curtis Haines, 2025-12-23
★★★★★
Highly recommend Mike
"Mike reached out first thing in the morning regarding my inquiry for a used engine. Very informative and helpful."
— Beatrice, 2026-03-31
★★★★★
Great experience
"Daisy kept me in the loop every step. My original engine was damaged before shipping; she found a different one quickly."
— Bryan Perkins, 2026-03-25
Our Photos-Before-Shipment Guarantee
Before any 2020 Blazer 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. That sits on top of 30-day money-back and up to a 3-year warranty.
✉ Email Us at info@autopowersource.com
