9-Speed Automatic Transmission Assembly for 2020-2023 Buick & Chevrolet
Product Notes Read before buying
This is a 9-speed automatic transmission for All-Wheel Drive (AWD) models equipped with the 1.3L engine only. It will not fit Front-Wheel Drive (FWD) models, which use a CVT transmission, or vehicles with the 1.2L engine.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Essence | SUV | 2020 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| Preferred | SUV | 2020 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| Select | SUV | 2020 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| 2021 - 2022 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| ACTIV | SUV | 2021 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| LS | SUV | 2021 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| LT | SUV | 2021 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| RS | SUV | 2021 - 2023 | L3 1.3L Turbo | AWD | Automatic |
| 2022 |
Know This Transmission Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this transmission family:
A quick look at your own vehicle makes sure the right transmission shows up:
- Verify the 8th digit of the VIN is 'L' (confirming the 1.3L Turbo engine).
- Confirm the vehicle is All-Wheel Drive (AWD).
- Check the driver's side door B-pillar or glove box QR/RPO label for codes 'M3F' (9T45 transmission) and 'F48' (AWD).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support fixture
- Subframe adapter/jack
- J2534 pass-thru programming device
- Professional OBD-II scan tool with GM Fast Learn capability
Budget for these consumables at install:
- GM DEXRON ULV (Ultra-Low Viscosity) automatic transmission fluid (Note: ULV is critical; do not use standard DEXRON-VI as it will cause shifting failures)
- Torque converter seal
- PTU gasket/seal
- Axle shaft seals
- Auxiliary filter cartridge (GM Part #24272927) and cover seal (if equipped)
- Transmission cooler line flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: Solenoid Characterization Reprogramming (TUN/PUN calibration) and TCM Adaptive Relearn (Fast Learn)
The replacement transmission's unique TUN/PUN codes must be programmed into the vehicle's TCM using GM's Service Programming System (SPS2) via a J2534 pass-thru tool. A Service Fast Learn and Park Lock Valve Learn must then be performed.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque converter must be fully seated into the front pump before bolting the transmission to the engine to prevent cracking the pump rotor.
- AWD PTU splines must be carefully aligned with the transmission's differential splines to avoid damaging the 43-spline output shaft or internal seals.
- Fluid level must be checked strictly via the side leveling plug with the engine running and fluid temperature between 80°C and 95°C (176°F to 203°F).
- Transmission cooler lines must be professionally flushed to clear debris from the previous failed unit.
Easy to get right once you know them:
- Ordering this AWD 9-speed automatic transmission for a Front-Wheel Drive (FWD) vehicle which uses a CVT.
- Skipping the mandatory TUN/PUN programming and adaptive relearn, resulting in limp mode or severe shifting issues.
- Using standard DEXRON-VI or generic multi-vehicle fluid instead of the required DEXRON ULV.
- Reusing old PTU seals, leading to fluid leaks between the transmission and transfer case.
- Checking the fluid level cold or with the engine off.
Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Address manufacturing debris or contamination in the valve body or solenoids.
🔎 Recommended at install: Replace selective one-way clutch (SOWC) housing snap ring if loss of forward drive occurs.
🔎 Recommended at install: Perform TCM software update to adjust torque converter clutch (TCC) slip calibration.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11302-4385291). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2020-2023 Encore GX & Trailblazer 1.3L AWD 9T45 Transmission: Problems, Identification, and Used Replacement
Identify the exact 9-speed Hydra-Matic 9T45 for your 1.3L Turbo AWD, learn what causes early solenoid and clutch failures, and know exactly what to look for when buying a used replacement unit.
Read Full Guide →Related Trouble Codes (OBD-II)
12 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Chevrolet: 24283290
Fits Years: 2020 2021 2022 2023
Your Go-To Place
for auto parts.
In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.
Confirmed Before It Ships
Every freight order is confirmed through a short guided interview — fitment, condition, delivery and warranty terms, e-signed before you're charged.
Trusted Since 2007
Nearly two decades of shipping parts to professionals & enthusiasts.
Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
What buyers are saying.
Racing Partner Videos
