This photo shows a similar part, not the exact one you'll receive. Since each used part has its own wear, yours may look slightly different.
OEM Main Engine Control Module for 2017-2020 Buick, Cadillac, Chevrolet, & GMC
$
52
.95
30-DayReturns
6-monthWarranty
100%Money-Back
Condition: Excellent (A) — like new, minimal to no wear
Professionally inspected and tested.
Product Notes Read before buying
This is a used part. For vehicles with the 3.6L engine (engine code LFX). Built for the US market. This is a programmable control module that must be programmed at a dealership to ensure driveability and emission standards.
IMPORTANT: This is a used electronic part that must be programmed by a dealership or a qualified automotive technician with the proper tools. Your vehicle will not start or run correctly until this module is programmed to your specific Vehicle Identification Number (VIN).
IMPORTANT: This is a used electronic part that must be programmed by a dealership or a qualified automotive technician with the proper tools. Your vehicle will not start or run correctly until this module is programmed to your specific Vehicle Identification Number (VIN).
⚠️ ELECTRONIC MODULE NOTICE
This module may require programming to your vehicle by a dealer or qualified technician with professional diagnostic equipment.
- Ships in a sealed inspection bag for visual inspection
- Returns not accepted if inspection bag has been opened
- "Needs programming" is not grounds for return
- If told the module "won't program," contact us before returning
- Defective units replaced ONLY ONCE, under warranty
1 Other Matching Unit Available
Same part, different stock options.
Why Buy Used OEM Parts?
Checked & Tested
We check and test every used part before we sell it. It may show some wear, but it works and is ready to install.
Original Equipment
This is the same part your vehicle came with from the factory. It fits and works just like the original — because it is one.
Works Like New
A few marks on the outside don't change what's inside. The part works the way it should.
Big Savings
Pay 50–80% less than buying new. Same factory part, much lower price.
Not sure? Ask Wrenchy — Your Parts Assistant.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
Buick
3 models(tapclick to hide)
Enclave
2017
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Convenience | SUV | 2017 | V6 3.6L | FWD | Automatic | Installs behind the fan shroud. |
| Leather | SUV | 2017 | V6 3.6L | AWD/FWD | Automatic | Installs behind the fan shroud. |
| Premium | SUV | 2017 | V6 3.6L | AWD/FWD | Automatic | Installs behind the fan shroud. |
Regal
2017
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| 2017 |
Verano
2017
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Sedan | 2017 | L4 2.4L FLEX | - |
| Base | Sedan | 2017 | L4 2.4L | - |
| Convenience | Sedan | 2017 | L4 2.4L FLEX | - |
| Leather | Sedan | 2017 | L4 2.4L | - |
| Leather | Sedan | 2017 | L4 2.4L FLEX | - |
| Sport Touring | Sedan | 2017 | L4 2.4L | - |
| Sport Touring | Sedan | 2017 | L4 2.4L FLEX | - |
Applies to every configuration above: FWD | Automatic | Fits models with the 2.4L engine.
Cadillac
1 model(tapclick to hide)
XTS
2017-2019
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Sedan | 2017 - 2019 | V6 3.6L | FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Livery | Hearse | 2017 - 2019 | V6 3.6L | FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Livery | Limousine | 2017 - 2019 | V6 3.6L | FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Luxury | Sedan | 2017 - 2019 | V6 3.6L | AWD/FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Platinum | Sedan | 2017 - 2019 | V6 3.6L | AWD/FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Premium | Sedan | 2017 | V6 3.6L | AWD/FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Premium Luxury | Sedan | 2017 - 2019 | V6 3.6L | AWD/FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Vsport Platinum | Sedan | 2017 - 2019 | V6 3.6L Turbo | AWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Vsport Premium Luxury | Sedan | 2017 | V6 3.6L Turbo | AWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
| Livery | Sedan | 2018 - 2019 | V6 3.6L | FWD | Automatic | Fits models with the 3.6L engine (VIN 3, 8th digit, opt LFX). |
Chevrolet
4 models(tapclick to hide)
Caprice
2017
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| PPV | Sedan | 2017 | V6 3.6L FLEX | RWD | Automatic | Fits models with the 3.6L engine. |
Equinox
2017
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| LT | SUV | 2017 | V6 3.6L FLEX | - |
| LT | SUV | 2017 | V6 3.6L | - |
| Premier | SUV | 2017 | V6 3.6L FLEX | - |
| Premier | SUV | 2017 | V6 3.6L | - |
Applies to every configuration above: AWD/FWD | Automatic | Installs in the LH (driver's side) of the engine compartment.
Impala
2017-2020
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| LS | Sedan | 2017 - 2019 | L4 2.5L FLEX | - |
| LS | Sedan | 2017 - 2019 | L4 2.5L | - |
| LS | Sedan | 2017 - 2019 | V6 3.6L FLEX | - |
| LS | Sedan | 2017 | V6 3.6L BI-FUEL | - |
| LS | Sedan | 2017 - 2019 | V6 3.6L | - |
| LT | Sedan | 2017 - 2019 | L4 2.5L | - |
| LT | Sedan | 2017 - 2019 | L4 2.5L FLEX | - |
| LT | Sedan | 2017 - 2020 | V6 3.6L FLEX | - |
| LT | Sedan | 2017 | V6 3.6L BI-FUEL | - |
| LT | Sedan | 2017 - 2020 | V6 3.6L | - |
| Premier | Sedan | 2017 - 2020 | V6 3.6L FLEX | - |
| Premier | Sedan | 2017 - 2020 | V6 3.6L | - |
| 2018 |
Applies to every configuration above: FWD | Automatic | Fits models with 2.5L or 3.6L engines.
Traverse
2017
(tapclick to hide)
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| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| LS | SUV | 2017 | V6 3.6L | - |
| LT | SUV | 2017 | V6 3.6L | - |
| Premier | SUV | 2017 | V6 3.6L | - |
Applies to every configuration above: AWD/FWD | Automatic | Installs behind the fan shroud.
GMC
2 models(tapclick to hide)
Acadia
2017
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Denali | SUV | 2017 | V6 3.6L | AWD/FWD/4WD | Automatic | Fits Acadia 'Limited' models only (VIN J, 11th digit), which is the carryover body style. Installs behind the fan shroud. |
| SL | SUV | 2017 | L4 2.5L | FWD | Automatic | Fits Acadia 'Limited' models only (VIN J, 11th digit), which is the carryover body style. Installs behind the fan shroud. |
| SLE | SUV | 2017 | L4 2.5L | FWD/4WD | Automatic | Fits Acadia 'Limited' models only (VIN J, 11th digit), which is the carryover body style. Installs behind the fan shroud. |
| SLE | SUV | 2017 | V6 3.6L | FWD/4WD | Automatic | Fits Acadia 'Limited' models only (VIN J, 11th digit), which is the carryover body style. Installs behind the fan shroud. |
| SLT | SUV | 2017 | L4 2.5L | FWD/4WD | Automatic | Fits Acadia 'Limited' models only (VIN J, 11th digit), which is the carryover body style. Installs behind the fan shroud. |
| SLT | SUV | 2017 | V6 3.6L | FWD/4WD | Automatic | Fits Acadia 'Limited' models only (VIN J, 11th digit), which is the carryover body style. Installs behind the fan shroud. |
Terrain
2017
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Denali | SUV | 2017 | V6 3.6L FLEX | - |
| Denali | SUV | 2017 | V6 3.6L | - |
| SLE | SUV | 2017 | V6 3.6L | - |
| SLE | SUV | 2017 | V6 3.6L FLEX | - |
| SLT | SUV | 2017 | V6 3.6L FLEX | - |
| SLT | SUV | 2017 | V6 3.6L | - |
Applies to every configuration above: AWD/FWD | Automatic | Installs in the LH (driver's side) of the engine compartment.
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.
Policies, in plain English.
Shipping & Handling
- Standard shipping: 3-7 business days via UPS Ground
- Parts are carefully packaged to prevent damage during transit
6-Month Warranty
All used parts include a 6-month warranty from the date of purchase.
- If your part fails within 6 months, we will send a replacement
- Refunds are only issued if we cannot provide a suitable replacement
- Warranty covers defects — not installation errors, misuse, or damage after installation
Note: Warranty is for replacement, not refund. A part failing on day 80? We'll replace it. But the return window for refunds is 30 days.
Returns (30 Days)
We accept returns within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
- 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: We cover return shipping as part of our 100% money-back guarantee
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
If your part arrives damaged:
- Stop immediately — do not install the part
- Keep all original packaging and boxes
- Take clear photos of the damage and packaging
- Contact us within 48 hours of delivery
We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.
Order Cancellation
Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.
Expert Guides
2018-2019 GM ECM Failure: Programming, Symptoms, and Replacement for Silverado, Escalade, Corvette & More
This guide covers the common failure symptoms and mandatory programming requirements for the engine control module (ECM) in many 2018-2019 GM trucks, SUVs, and cars.
Read Full Guide →Related Trouble Codes (OBD-II)
25 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.
P0308
Decoding a Misfire on a Non-Existent Cylinder
2010-2017 Gmc TERRAIN
P0308
An Impossible Misfire Code Explained
2011-2018 Buick REGAL
P0308
Why Your V6 is Showing a V8 Misfire Code
2013-2019 Cadillac XTS
P0601
Internal Module Memory Error Causes and Fixes
2010-2017 Chevrolet Equinox
P0601
Internal Control Module Memory Error Causes and Fixes
2010-2017 Gmc TERRAIN
P0601
Internal Memory Fault Causes & Fixes
2015-2022 Chevrolet EQUINOX
P0606
ECM Processor Fault Causes and Fixes
2010-2017 Chevrolet Equinox
P0606
ECM Processor Fault Causes and Fixes
2008-2017 Buick Enclave
P0606
ECM Processor Fault Causes & Fixes
2017-2024 Chevrolet TRAVERSE
P0606
ECM Processor Fault Causes and Fixes
2015-2022 Gmc ACADIA
P0689
Causes and Fixes for Stalling
2013-2017 Gmc ACADIA
P0689
Stalling, Causes, and Fixes
2013-2017 Chevrolet TRAVERSE
↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.
Miscellaneous Information
OEM Part Numbers:
GM: 12666070, 12667002, 12667189, 12670801
Other: 12643636, 126667002, 12668866, 12668991, 12685918, 12692200
Fits Years: 2017 2018 2019 2020
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This part ships with a 6-month warranty. If it doesn't fit or stops working, we replace or refund — no hassle.
What buyers are saying.
★★★★★
4.9
1,451 verified reviews
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