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Engine Control Module (ECM)
This photo shows the same type of part you'll receive. Since each used part has its own wear and scratches, yours may look slightly different. Check the product notes for details about the condition of this specific part.

2002 Chevrolet Trailblazer Powertrain Control Module (PCM) (OEM)

Only 1 left in stock
$59.95

ℹ️ Product Notes

This is a used part. This is the main computer for your engine (Engine Control Unit or ECU). It is also called the Powertrain Control Module (PCM). IMPORTANT: This module must be programmed by a car dealer to make sure your car runs right and meets pollution rules.

Must be programmed by a dealer or shop to your VIN. Fits 4.2L 6-cylinder models only. Check your old part for matching numbers.
Condition: Excellent (A)
Like new, minimal to no wear
120,520 miles
Odometer reading when part was removed
See Other Chevrolet Trailblazer Engine Control Module (ECM)s
SKU #
3375251-63360-095

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:

Chevrolet
Trailblazer 2002 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
LS SUV 2002 L6 4.2L RWD/4WD | Automatic | Fits 4.2L 6-cylinder engine only
LT SUV 2002 L6 4.2L RWD/4WD | Automatic | Fits 4.2L 6-cylinder engine only
LTZ SUV 2002 L6 4.2L RWD/4WD | Automatic | Fits 4.2L 6-cylinder engine only
North Face SUV 2002 L6 4.2L RWD/4WD | Automatic | Fits 4.2L 6-cylinder 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 the Powertrain Control Module (PCM) is Failing

  • Check Engine Light is on
  • Engine stalls or runs rough
  • Poor fuel economy
  • Transmission shifting problems
  • Difficulty starting the engine
  • Complete failure to start
  • Misfires
  • Failed emissions test

How to Test if This Part is the Problem vs Other Components

  1. Get the trouble codes read. A mechanic can use a scan tool to see what codes are stored in your vehicle's computer.
  2. Check the wiring and connections. Make sure there are no loose wires, corrosion, or damage to the connectors.
  3. Test sensors and other components. The PCM relies on information from various sensors. Test these sensors to make sure they are working correctly.
  4. Have a professional diagnose the PCM. A qualified mechanic can use specialized equipment to test the PCM and determine if it is faulty.

Common Failure Causes for This Part

  • Overheating
  • Electrical surges or shorts
  • Water damage
  • Vibration
  • Age and normal wear and tear

Buyer's Checklist

What to Look for When Buying This Part

  • Compatibility with your vehicle's year, make, and model.
  • Condition of the part (if used). Look for signs of damage or wear.
  • Warranty offered by the seller.
  • Seller reputation and reviews.

Quality Indicators for the Available Options

| Feature | Used OEM

  • Used OEM parts have been tested and inspected.
  • Used OEM parts are typically cheaper than new aftermarket parts.
  • Used OEM parts are genuine factory parts.

What's Typically Included with the Part

  • The Powertrain Control Module (PCM) itself.
  • No additional hardware, brackets, or sensors are included unless specifically stated.

Installation Overview

Difficulty Level and Estimated Time

  • Difficulty: Medium
  • Estimated Time: 1-2 hours

Special Tools Needed (if any)

  • Basic hand tools (sockets, wrenches, screwdrivers)
  • Scan tool to clear trouble codes (optional, but recommended)
  • Anti-static wrist strap (recommended)

Critical Steps and Tips

  1. Disconnect the negative battery cable.
  2. Locate the PCM. It's usually under the hood or under the dash.
  3. Disconnect the wiring harness connectors from the PCM.
  4. Remove the old PCM.
  5. Install the new PCM.
  6. Reconnect the wiring harness connectors.
  7. Reconnect the negative battery cable.
  8. Clear any trouble codes with a scan tool.

Whether DIY is Recommended or Professional Installation is Better

  • DIY is possible for mechanically inclined individuals.
  • Professional installation is recommended if you are not comfortable working on your vehicle's electrical system.

Buying Options

| Option | Description the part is tested and inspected.

  • The part is a genuine factory part.

New Aftermarket

  • The part is brand new.
  • The part is made by a third-party manufacturer.
  • The part is built to meet or exceed OEM specifications.

Typical Lifespan

How Long This Part Normally Lasts

  • A PCM can last for the entire lifespan of the vehicle, often 10-15 years or more.

Factors That Affect Longevity

  • Operating temperature
  • Electrical surges
  • Water damage
  • Vibration
  • Quality of the replacement part

Price Ranges

Budget vs Mid-Range vs Premium Options

  • Used OEM: $100 - $300
  • New Aftermarket: $200 - $500

Labor Cost Considerations if Applicable

  • Labor costs can range from $100 to $300, depending on the mechanic and the complexity of the job.

Total Job Cost Estimates

  • Used OEM PCM + Labor: $200 - $600
  • New Aftermarket PCM + Labor: $300 - $800

Vehicle-Specific Notes

Known Issues for This Vehicle's System Related to This Part

  • Some vehicles in this year range have reported issues with the PCM causing false trouble codes or intermittent engine performance problems.
  • Corrosion in the wiring harness connectors can also contribute to PCM failures.

Any TSBs or Common Complaints

  • Check with a trusted mechanic or online resources for any Technical Service Bulletins (TSBs) related to PCM issues for your specific vehicle model.

Verification After Install

How to Confirm Proper Operation

  • Start the engine and let it idle.
  • Check for any warning lights on the dashboard.
  • Take the vehicle for a test drive.

What to Look/Listen for to Verify It's Working Correctly

  • Smooth engine operation
  • Proper transmission shifting
  • No unusual noises
  • No hesitation or stalling
  • Check engine light should be off (unless other issues exist)

FAQ

Q: Will this PCM need to be programmed?
A: It might. Some PCMs require programming to match your vehicle's specific VIN and options. Check with your mechanic or the seller to confirm if programming is necessary.

Q: What happens if I install a PCM that isn't programmed correctly?
A: Your vehicle may not start, or it may run poorly. You may also experience transmission problems or other issues.

Q: How can I tell if my PCM is bad?
A: Common symptoms include a check engine light, engine stalling, poor fuel economy, and transmission problems. A mechanic can diagnose the PCM using a scan tool.

Q: Is it difficult to replace a PCM myself?
A: Replacing a PCM is a medium-level DIY job. It requires basic mechanical skills and some tools. If you are not comfortable working on your vehicle's electrical system, it is best to have a professional install the PCM.

Q: What is the difference between a used OEM PCM and a new aftermarket PCM?
A: A used OEM PCM is a genuine factory part that has been removed from another vehicle. A new aftermarket PCM is a brand new part that is made by a third-party manufacturer. Used OEM PCMs are typically cheaper than new aftermarket PCMs.

Part Specifications

OEM Part Numbers:

  • Chevrolet: 12223160, 12571178, 12571910, 12574238, 12575331, 12576161, 12576462, 12576463, 16255240, 19210066
  • Other: DLDA, YBLR, YBRY, YBZP

Fits Years: 2002

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