6-speed Automatic Transmission Assembly for 2013-2014 Cadillac, Chevrolet, & GMC
Product Notes Read before buying
This is a 6-speed automatic transmission (GM option code MYC / 6L80) for vehicles with 4-wheel drive (4WD) or All-wheel drive (AWD). It is compatible with both 5.3L and 6.2L V8 gasoline engines. Please verify your vehicle's engine, drivetrain, and transmission type before ordering.
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 |
|---|---|---|---|---|
| 2013 - 2014 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2013 - 2014 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2013 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Crew Cab Pickup | 2013 | V8 5.3L FLEX | AWD | Automatic |
| Black Diamond LS | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| Black Diamond LT | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| Black Diamond LTZ | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2013 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| LT | SUV | 2013 | V8 5.3L | AWD | Automatic | Hollander: SUBURBAN 1500 13-14 AT; 4x4; drive_type: include 4WD; drive_type: include AWD; engine_size: include 5.3L; engine_size: include 6.2L; transmission: include Automatic; transmission_speeds: include 6; fuel_type: include GAS [inferred] |
| 2014 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| LT | SUV | 2013 | V8 5.3L | AWD | Automatic |
| LT | SUV | 2014 | V8 5.3L | 4WD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| SL | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SL | Extended Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SLE | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SLE | Extended Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SLE | Standard Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SLT | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SLT | Extended Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| WT | Crew Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| WT | Extended Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| WT | Standard Cab Pickup | 2013 | V8 5.3L FLEX | 4WD | Automatic |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2013 - 2014 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2013 - 2014 |
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 to confirm a 5.3L or 6.2L V8 engine.
- Physically confirm the presence of a transfer case and front driveshaft (4WD/AWD).
- Locate the RPO codes on the SPID sticker in the glove box and verify the code 'MYC'.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Heavy-duty transmission jack
- Torque converter depth alignment tool or precision caliper
- J2534 pass-thru programming device or GM MDI scan tool
- Cooler line flushing tool
- Vehicle lift
Budget for these consumables at install:
- DEXRON-VI Automatic Transmission Fluid (12.0 to 13.0 quarts for dry fill)
- Transmission Filter & Pan Gasket Kit
- Torque Converter Seal (Front Pump Seal)
- Transfer Case Adapter Gasket (GM Part No. 24245110)
- Transfer Case Input Seal
- Professional Transmission Cooler Flush Solvent
- Updated Thermal Bypass Valve (GM Part No. 85585333 / stamped '70')
What your vehicle’s computers will need after the swap:
What’s involved: VIN-Specific Flash Programming & TCM Adaptive Relearn (Fast Learn)
The internal TEHCM/TCM must be programmed with the vehicle's specific VIN and software calibration using a J2534 pass-thru tool or GM MDI with GM SPS2. An adaptive pressure relearn (Fast Learn) must be performed after programming.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- The 'Three-Click' Torque Converter Seating Rule: Ensure the converter is fully seated and recessed at least 1.0 inch inside the bellhousing before bolting to the engine to avoid cracking the front pump.
- Mandatory Cooler Line Flush: Debris from the previous failure must be completely flushed out to prevent immediate contamination and failure of the replacement unit.
- Precise Fluid Leveling Procedure: The 6L80 has no dipstick. Fluid level must be checked via the standpipe plug in the pan with the engine running, vehicle level, and fluid temperature strictly between 86°F and 122°F.
- Dowel Pin Alignment: Ensure bellhousing dowel pins are clean and present to prevent pump and converter damage from misalignment.
Easy to get right once you know them:
- Reusing the old torque converter which contains contaminated fluid and metal shavings.
- Skipping the mandatory TCM/TEHCM programming step, leading to a no-start condition or limp-home mode.
- Reusing a contaminated cooler without performing a thorough flush.
- Ordering a 4WD/AWD transmission for a 2WD vehicle.
- Reusing torque-to-yield torque converter bolts.
- Incorrect fluid level checks due to not following the temperature-specific standpipe procedure.
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: Replace original bypass valve with updated '70' version (GM Part No. 85585333) opening at 158°F.
🔎 Recommended at install: Replace torque converter, flush cooler lines, and use specified fluid.
🔎 Recommended at install: Replace cast-aluminum piston.
🔎 Recommended at install: Replace rubber membranes or complete TEHCM assembly.
🔎 Recommended at install: Legal/Financial awareness of hesitation, jerking, and shuddering defects.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-04847-5479193). 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
2013-2014 GM Truck & SUV 6L80 Transmission: Problems, Identification, and Used Replacement
Identify the MYC 6-speed automatic, understand what causes torque converter shudder and overheating, and know when to replace it with a quality used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
50 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:
GM: 24250602
Other: 3CJA, 3CKA
Fits Years: 2013 2014
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Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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