2021 - 2024 Chevrolet Trailblazer Engine Control Module (ECM) (OEM)
✓IN STOCK
$69.95
⚠️ 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. This is the main Engine Control Module (ECM). The ECM is the computer that controls how your engine runs. It fits vehicles with 1.2L, 1.5L, or 2.0L engines. IMPORTANT: This module may need to be reprogrammed by a mechanic before it will work in your vehicle.
Requires professional programming to your VIN before it will start the car. Match your original part number exactly.
Original Part #(s): 12680194, 12691559, 12693292, 12696017, 12697426, 12702989, 12703776, 12709219, 12711695, 12719250, 12721667, 12739544
✓ 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:
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Chevrolet
Trailblazer2021-2024(tapclick to expand)(tapclick to hide)
⚠️ 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.
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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: Your car might have trouble starting, stall often, or run rough. The check engine light might come on. You might also notice problems with shifting, poor fuel economy, or complete failure to start.
Testing: A mechanic can use a scan tool to read codes from the computer. They can also check the wiring and sensors connected to the module. It's important to rule out other problems like a bad sensor, fuel pump, or ignition coil before replacing the module.
Common Causes: This part can fail due to electrical surges, water damage, overheating, or physical damage. Sometimes, vibrations over time can also cause it to fail.
Buyer's Checklist
What to Look For: Check for physical damage like cracks or corrosion. Make sure the part is clean and the connectors are in good shape.
Quality Indicators: For used parts, look for ones that have been tested and inspected. Ask about a warranty. For new aftermarket parts, choose reputable brands.
What's Included: Typically, you'll receive just the module itself. You may need to have it programmed to your specific vehicle.
Special Tools: You'll need basic hand tools and possibly a scan tool to clear any codes after installation. Some modules require programming with specialized equipment.
Critical Steps and Tips:
Disconnect the battery before starting.
Locate the module (usually under the hood or dash).
Disconnect the wiring harness.
Remove the old module.
Install the new module.
Reconnect the wiring harness.
Reconnect the battery.
Program the module if necessary.
DIY or Professional: Replacing the module itself is often DIY-able. However, programming often requires professional equipment. If you're not comfortable with electrical work or programming, it's best to have a professional install it.
Buying Options
Used OEM: These are genuine factory parts that have been tested and inspected. They offer a good balance of quality and price.
New Aftermarket: These are brand new parts made by third-party companies. They are built to meet or exceed OE specifications.
Option
Pros
Cons
Used OEM
Genuine part, tested, lower price
May have some wear, limited warranty
New Aftermarket
Brand new, readily available, often comes with a good warranty
Quality can vary, may not fit as perfectly as OEM
Related Parts
Related Parts: Check the wiring harness and connectors for damage. Also, consider replacing any sensors that are known to cause problems with the engine control system.
Preventing Repeat Failures: Replacing related parts can prevent repeat failures by addressing the root cause of the problem. For example, a faulty sensor can damage the module over time.
Typical Lifespan
How Long It Lasts: This part can last for 10 years or more under normal conditions.
Factors Affecting Longevity: Extreme temperatures, moisture, and electrical problems can shorten its lifespan. Regular vehicle maintenance can help extend its life.
Price Ranges
Budget: Used OEM - $150 - $300
Mid-Range: New Aftermarket - $250 - $450
Premium: New Aftermarket (High-End Brand) - $400 - $600
Labor Cost: Labor costs can range from $100 to $300, depending on the shop and the complexity of the job. Programming can add to the cost.
Total Job Cost: Expect to pay between $250 and $900 for the entire job, including the part and labor.
Vehicle-Specific Notes
Known Issues: Some vehicles may experience issues with the module due to voltage fluctuations or sensor failures. Check for any Technical Service Bulletins (TSBs) related to this part and your specific vehicle. Some owners have reported issues with rough idling or misfires that were resolved by replacing this module.
Verification After Install
Confirming Proper Operation: After installation, start the engine and let it idle. Check for any warning lights on the dashboard.
What to Look/Listen For: Make sure the engine runs smoothly and responds correctly to the accelerator. Take the vehicle for a test drive to ensure it shifts properly and performs as expected. If you had to program the module, verify that all systems are functioning correctly.
FAQ
Q: Will this module work with my specific vehicle?
A: This module is designed for certain Buick, Chevrolet, and GMC models from 2020-2025. Check your vehicle's specifications to confirm compatibility.
Q: Do I need to program this module after installation?
A: It depends. Some modules require programming to match your vehicle's specific settings. Check with a mechanic or the part supplier to see if programming is necessary.
Q: What happens if I install the module incorrectly?
A: Installing the module incorrectly can damage the module or your vehicle's electrical system. It's important to follow the installation instructions carefully or have a professional install it.
Q: How do I know if my module is bad?
A: Common signs of a bad module include a check engine light, trouble starting, stalling, and poor engine performance. A mechanic can diagnose the problem using a scan tool.
Q: What is the warranty on this part?
A: The warranty varies depending on whether you buy a used OEM or new aftermarket part. Used parts typically have a shorter warranty than new parts. Check with the seller for specific warranty information.
