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Engine Control Module (ECM)
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OEM Engine Control Module (ECM) for 2021-2025 Buick, Cadillac, Chevrolet, & GMC

Only 1 left in stock
$78.95

⚠️ 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

ℹ️ Product Notes

This is a used part. It is the main computer for your engine (Engine Control Module). It fits vehicles with 1.3L or 2.0L engines. A mechanic may need to reprogram this module so it works correctly with your vehicle.

Requires professional programming to your VIN. Match your original part number exactly before ordering.

Original Part #(s): 12725787, 12730098
Condition: Excellent (A)
Like new, minimal to no wear
25,122 miles
Odometer reading when part was removed
See All Other Engine Control Module (ECM)s
SKU #
2386805-06221-095

Why Buy Used OEM Parts?

✓ Quality-Verified: Every used OEM part we sell has been professionally inspected and tested to ensure it meets our quality standards. While it may show some cosmetic wear from previous use, it's fully functional and ready to install.

✓ Original Equipment: This is a genuine OEM (Original Equipment Manufacturer) part - the exact same part that came with your vehicle from the factory. It's designed specifically for your make and model, ensuring perfect fitment and performance.

✓ Works Like New: Despite some visual wear, this part will perform just as well as a brand new one. The internal components and functionality are intact, giving you the same reliability you'd expect from OEM quality.

✓ Significant Savings: Save 50-80% compared to buying new! Used OEM parts offer exceptional value - you get factory quality at a fraction of the cost. It's the smart choice for budget-conscious vehicle owners who won't compromise on quality.

✓ Risk-Free Purchase: We stand behind our used parts with a generous 6-month warranty, 30-day returns, and 100% money-back guarantee. If it doesn't work out for any reason, simply return it for a full refund. You have nothing to lose!

🛡️ 30-Day Returns + 6-Month Warranty - Buy with Confidence!

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Vehicle Fitment Guide

This part fits the following vehicles:

Buick 1 model(tapclick to expand)(tapclick to hide)
Encore GX 2021-2025 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Convenience SUV 2021 - 2023 L3 1.3L Turbo FWD | Automatic CVT | Fits 1.3L turbo engine only
Essence SUV 2021 - 2023 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.3L turbo engine only
Leather SUV 2021 - 2022 L3 1.3L Turbo FWD | Automatic CVT | Fits 1.3L turbo engine only
Preferred SUV 2021 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.3L turbo engine only
Select SUV 2021 - 2023 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.3L turbo engine only
Sport Touring SUV 2021 - 2025 L3 1.3L Turbo FWD | Automatic CVT | Fits 1.3L turbo engine only
Avenir SUV 2024 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.3L turbo engine only
Sport Touring SUV 2024 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.3L turbo engine only
Cadillac 3 models(tapclick to expand)(tapclick to hide)
XT4 2021-2025 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Luxury SUV 2021 - 2024 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Premium Luxury SUV 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Sport SUV 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
2022 - 2023
XT5 2021-2025 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Livery Hearse 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Livery Limousine 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Livery SUV 2021 - 2023 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Luxury SUV 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Premium Luxury SUV 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
2022, 2024
XT6 2021-2025 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Luxury SUV 2021 - 2025 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
2022 - 2024
Chevrolet 3 models(tapclick to expand)(tapclick to hide)
Blazer 2021-2025 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
LT SUV 2021 - 2022 L4 2.0L Turbo AWD | Automatic | Fits 2.0L turbo engine only
LT SUV 2021 - 2025 L4 2.0L Turbo FWD | Automatic | Fits 2.0L turbo engine only
Premier SUV 2021 - 2025 L4 2.0L Turbo FWD | Automatic | Fits 2.0L turbo engine only
Premier SUV 2021 - 2022 L4 2.0L Turbo AWD | Automatic | Fits 2.0L turbo engine only
True North SUV 2021 L4 2.0L Turbo AWD | Automatic | Fits 2.0L turbo engine only
LT SUV 2023 - 2025 L4 2.0L Turbo 4WD | Automatic | Fits 2.0L turbo engine only
Premier SUV 2023 - 2025 L4 2.0L Turbo 4WD | Automatic | Fits 2.0L turbo engine only
Silverado 1500 2022 (tapclick to expand)(tapclick to hide)
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SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Custom Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Custom Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Custom Trail Boss Crew Cab Pickup 2022 L4 2.7L Turbo 4WD | Automatic | Fits 2.7L engine only
LT Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
LT Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
LT Trail Boss Crew Cab Pickup 2022 L4 2.7L Turbo 4WD | Automatic | Fits 2.7L engine only
RST Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
RST Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
WT Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
WT Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
WT Standard Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Trailblazer 2021-2025 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
ACTIV SUV 2021 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
L SUV 2021 - 2022 L3 1.2L Turbo FWD | Automatic CVT | Fits 1.2L or 1.3L turbo engines
LS SUV 2021 - 2024 L3 1.2L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
LS SUV 2021 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
LT SUV 2021 - 2024 L3 1.2L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
LT SUV 2021 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
RS SUV 2021 - 2025 L3 1.3L Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
LS SUV 2025 L3 1.2L FLEX Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
LT SUV 2025 L3 1.2L FLEX Turbo AWD/FWD | Automatic & Automatic CVT | Fits 1.2L or 1.3L turbo engines
2023
GMC 2 models(tapclick to expand)(tapclick to hide)
Acadia 2021-2023 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Denali SUV 2021 - 2023 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
SLE SUV 2021 - 2023 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
SLT SUV 2021 - 2023 L4 2.0L Turbo FWD/4WD | Automatic | Fits 2.0L turbo engine only
Sierra 1500 2022 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
Elevation Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Elevation Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Pro Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Pro Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
Pro Standard Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
SLE Crew Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only
SLE Extended Cab Pickup 2022 L4 2.7L Turbo RWD/4WD | Automatic | Fits 2.7L engine only

⚠️ Important: Please verify your vehicle's year, make, model, and specifications before ordering. If you're unsure about fitment, contact our customer service team for assistance.

Policies

Shipping & Handling

  • Standard shipping: 3-7 business days via UPS Ground
  • Parts are carefully packaged to prevent damage during transit

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

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.

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.

Symptoms & Diagnosis

Warning Signs of a Failing Engine Control Module (ECM)

  • Check Engine Light is on
  • Engine stalls or misfires
  • Poor fuel economy
  • Difficulty starting the engine
  • Transmission shifting problems
  • Vehicle fails emissions testing
  • Unusual engine performance

Testing the ECM

Is the ECM really the problem? Here's how to check:

  1. Check the Basics: Make sure the battery, spark plugs, fuel injectors, and sensors are working correctly. A problem with any of these can mimic ECM issues.
  2. Scan for Codes: Use an OBD-II scanner to read diagnostic trouble codes (DTCs). This will give you clues about what's wrong.
  3. Inspect Wiring: Look for damaged or corroded wires and connectors going to the ECM.
  4. Professional Testing: A qualified mechanic can use specialized tools to test the ECM's inputs and outputs. This is the most accurate way to diagnose an ECM problem.

Common Causes of ECM Failure

  • Overheating: High temperatures can damage the ECM's internal components.
  • Water Damage: Moisture can cause corrosion and short circuits.
  • Voltage Spikes: Electrical surges can fry the ECM.
  • Vibration: Constant vibration can loosen connections and damage the ECM.
  • Age: Like any electronic component, ECMs can simply wear out over time.

Buyer's Checklist

What to Look For When Buying

  • Proper Fit: Make sure the ECM is designed for your specific year, make, and model vehicle.
  • Warranty: A warranty protects you if the ECM fails shortly after installation.
  • Seller Reputation: Buy from a reputable seller with good reviews.
  • Condition: If buying a used ECM, ask about its history and condition.

Quality Indicators

FeatureUsed OEMNew Aftermarket
OriginGenuine factory partThird-party manufacturer
TestingTypically tested and inspectedNew, but may not have undergone same rigorous testing as OEM
ReliabilityKnown reliability of original equipmentReliability can vary depending on the manufacturer
PriceGenerally lower than new aftermarketPrices can vary widely

What's Included

  • The ECM itself
  • Sometimes, basic installation instructions (check with the seller)

Installation Overview

Difficulty Level and Estimated Time

  • Difficulty: Medium
  • Estimated Time: 1-3 hours

Special Tools Needed

  • Basic hand tools (sockets, wrenches, screwdrivers)
  • OBD-II scanner
  • Possibly a security torx bit (depending on the vehicle)

Critical Steps and Tips

  1. Disconnect the Battery: This is crucial to prevent electrical damage.
  2. Locate the ECM: It's usually under the dashboard, under a seat, or in the engine compartment. Consult your vehicle's repair manual.
  3. Disconnect the Connectors: Carefully disconnect the wiring harness connectors from the ECM.
  4. Remove the Old ECM: Unbolt the ECM from its mounting bracket.
  5. Install the New ECM: Bolt the new ECM in place and reconnect the wiring harness connectors.
  6. Reconnect the Battery:
  7. Program the ECM: Many ECMs need to be programmed to your vehicle's VIN. This may require a professional.

DIY or Professional Installation?

  • DIY is possible if you have mechanical skills and experience. However, programming the ECM often requires specialized equipment and knowledge, so professional installation is often recommended.

Buying Options

Used OEM

  • Description: Genuine factory part taken from a used vehicle.
  • Pros: Best value, original equipment quality, tested and inspected.
  • Cons: May have some wear and tear.

New Aftermarket

  • Description: Brand new part manufactured by a third-party company.
  • Pros: New condition, readily available.
  • Cons: Quality can vary, may not be as reliable as OEM.

Typical Lifespan

How Long This Part Normally Lasts

  • An ECM can last for the life of the vehicle, often 10-15 years or more.

Factors That Affect Longevity

  • Operating Temperature: Extreme heat can shorten the ECM's lifespan.
  • Electrical Issues: Voltage spikes and short circuits can damage the ECM.
  • Moisture: Water damage can cause corrosion and failure.
  • Vehicle Maintenance: Proper vehicle maintenance can help prevent problems that can stress the ECM.

Price Ranges

Budget vs Mid-Range vs Premium Options

  • Used OEM: $150 - $400
  • New Aftermarket: $250 - $600

Labor Cost Considerations

  • Professional installation can add $100 - $300 to the total cost, depending on the shop and the complexity of the job. Programming the ECM can also add to the labor cost.

Total Job Cost Estimates

  • DIY (Used OEM): $150 - $400 (plus cost of any needed tools)
  • DIY (New Aftermarket): $250 - $600 (plus cost of any needed tools)
  • Professional Installation (Used OEM): $250 - $700
  • Professional Installation (New Aftermarket): $350 - $900

Vehicle-Specific Notes

Known Issues

  • Some 2023-2025 Buick, Cadillac, Chevrolet, and GMC vehicles have reported issues with ECM software glitches that can cause intermittent engine performance problems. A software update may be required after installation.
  • Check for any Technical Service Bulletins (TSBs) related to ECM issues for your specific vehicle model.

Verification After Install

How to Confirm Proper Operation

  • Check Engine Light: Make sure the Check Engine Light is off after installation and programming.
  • Scan for Codes: Use an OBD-II scanner to check for any new or pending diagnostic trouble codes (DTCs).
  • Test Drive: Take the vehicle for a test drive to see if the engine runs smoothly and the transmission shifts properly.

What to Look/Listen For

  • Smooth engine idle
  • No engine misfires or stalling
  • Proper transmission shifting
  • Normal fuel economy
  • No unusual noises or vibrations

FAQ

Q: Will this ECM work with my 2024 Chevy Silverado?
A: This ECM is designed to work with 2023-2025 Buick, Cadillac, Chevrolet, and GMC vehicles. However, you need to verify that the part is compatible with your specific engine and trim level.

Q: Does this ECM need to be programmed?
A: Yes, this ECM will likely need to be programmed to your vehicle's VIN (Vehicle Identification Number) for it to function correctly.

Q: What happens if I don't program the ECM?
A: If you don't program the ECM, the vehicle may not start, or it may run poorly. Some features may not work correctly.

Q: Is there a warranty on this ECM?
A: Warranty coverage depends on the seller. Check the seller's warranty policy before you buy.

Q: Can I return the ECM if it doesn't fix my problem?
A: Return policies vary by seller. Check the seller's return policy before you buy.

Part Specifications

OEM Part Numbers:

  • GM: 12725787, 12730098

Fits Years: 2021 2022 2023 2024 2025

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