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Body Control Module
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2021 - 2025 Chevrolet Trailblazer Transmission Control Module (OEM)

✓ IN STOCK
$89.95

ℹ️ Product Notes

This is a used part. This is the Transmission Control Module (TCM) that controls the automatic transmission. It is sometimes called the TRANS ECU. This module works with 9-speed automatic transmissions (AT) and fits 2.0L or 6.2L engines. It is located in the engine compartment. IMPORTANT: This module may need to be programmed by a mechanic to work correctly with your vehicle.

Requires professional programming to your VIN. Fits 2.0L or 6.2L engines with 9 or 10-speed automatic transmissions only.
Condition: Excellent (A)
Like new, minimal to no wear
662 miles
Odometer reading when part was removed
SKU #
8892305-06131-195

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 2023 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
2023

⚠️ 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 Transmission Control Module (TCM)

  • Erratic shifting or failure to shift
  • Transmission slipping
  • Harsh or delayed gear engagement
  • Check Engine Light is on
  • Vehicle stuck in limp mode (reduced power)
  • Poor fuel economy

Testing the TCM

It can be tricky to know if the TCM is the problem. Here's how to check:

  1. Scan for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to see if any transmission-related codes are present. These codes can point to a TCM issue.
  2. Check Wiring and Connections: Inspect the wiring harness and connectors leading to the TCM for damage, corrosion, or loose connections.
  3. Test Input and Output Signals: A mechanic can use a multimeter or oscilloscope to test the signals going in and out of the TCM. This helps determine if the TCM is sending and receiving the correct information.
  4. Consider Other Components: Rule out other potential causes like low transmission fluid, faulty sensors, or a bad valve body.

Common Failure Causes

  • Overheating: High temperatures can damage the TCM's internal components.
  • Electrical surges: Voltage spikes can fry the TCM's circuitry.
  • Vibration: Constant vibration can loosen connections and cause internal damage.
  • Water damage: Exposure to moisture can corrode the TCM's internal components.
  • Age: Like any electronic component, TCMs can simply wear out over time.

Buyer's Checklist

What to Look For When Buying

  • Proper Fit: Make sure the TCM is designed for your vehicle's year, make, and model.
  • Warranty: A warranty provides peace of mind in case the TCM fails prematurely.
  • Condition: If buying used, check for any signs of physical damage or corrosion.
  • Reputation of Seller: Buy from a reputable seller with good reviews and a clear return policy.

Quality Indicators

FeatureUsed OEMNew Aftermarket
OriginOriginal Equipment Manufacturer (OEM)Third-party manufacturer
TestingTypically tested and inspectedMay or may not be thoroughly tested
ReliabilityKnown reliability of the original partReliability can vary by manufacturer
PriceGenerally lower than new aftermarketCan be comparable or slightly higher

What's Included

Typically, you'll receive just the Transmission Control Module itself. You may need to reuse existing mounting hardware.

Installation Overview

Difficulty Level and Estimated Time

Installing a TCM can range from moderate to difficult, depending on your mechanical skills and the vehicle's design. Estimated time: 1-3 hours.

Special Tools Needed

  • Basic hand tools (sockets, wrenches, screwdrivers)
  • OBD-II scanner (for clearing codes)
  • Multimeter (optional, for testing)

Critical Steps and Tips

  1. Disconnect the Battery: Always disconnect the negative battery cable before working on electrical components.
  2. Locate the TCM: The TCM is typically located under the dashboard, under a seat, or in the engine compartment. Consult your vehicle's repair manual for the exact location.
  3. Disconnect Connectors: Carefully disconnect the electrical connectors from the TCM.
  4. Remove the Old TCM: Unbolt or unclip the old TCM from its mounting bracket.
  5. Install the New TCM: Install the new TCM in the mounting bracket and reconnect the electrical connectors.
  6. Reconnect the Battery: Reconnect the negative battery cable.
  7. Clear Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to clear any transmission-related DTCs.

DIY or Professional Installation?

If you're comfortable working on cars and have some experience with electrical systems, you may be able to install the TCM yourself. However, if you're not confident, it's best to have a professional mechanic do the job.

Buying Options

Used OEM

Used OEM TCMs offer excellent value. These are genuine factory parts that have been tested and inspected to ensure they're in good working condition. You get the reliability of an OEM part at a significantly lower price than a new aftermarket unit.

New Aftermarket

New aftermarket TCMs are brand new parts manufactured by third-party companies. They are designed to meet or exceed OE specifications. The quality can vary depending on the manufacturer.

FeatureUsed OEMNew Aftermarket
PriceLowerCan be comparable or slightly higher
ReliabilityTypically very reliableReliability can vary by manufacturer
WarrantyUsually comes with a limited warrantyUsually comes with a limited warranty

Typical Lifespan

How Long This Part Normally Lasts

A TCM can last for the life of the vehicle, but its lifespan can vary depending on several factors. A typical lifespan is 100,000-150,000 miles or 7-10 years.

Factors That Affect Longevity

  • Driving habits: Aggressive driving can put more stress on the transmission and TCM.
  • Maintenance: Regular transmission fluid changes can help prolong the life of the TCM.
  • Environmental conditions: Extreme temperatures and humidity can damage the TCM.
  • Vehicle usage: Towing heavy loads can put extra strain on the transmission and TCM.

Price Ranges

Budget vs. Mid-Range vs. Premium

  • Used OEM: $150 - $300
  • New Aftermarket: $200 - $400

Labor Cost Considerations

Labor costs for TCM installation can range from $100 to $300, depending on the mechanic's hourly rate and the complexity of the job.

Total Job Cost Estimates

  • Used OEM: $250 - $600 (including labor)
  • New Aftermarket: $300 - $700 (including labor)

Vehicle-Specific Notes

Known Issues

Some vehicles within the 2018-2025 Buick, Cadillac, Chevrolet, and GMC range have reported issues with harsh shifting or transmission slipping that can be attributed to the TCM. Check for any Technical Service Bulletins (TSBs) related to your specific vehicle model and transmission. Common complaints include delayed engagement when shifting into drive or reverse.

Verification After Install

How to Confirm Proper Operation

  • Smooth Shifting: The transmission should shift smoothly and without hesitation.
  • No Warning Lights: The Check Engine Light should be off.
  • Normal Performance: The vehicle should accelerate and perform as expected.
  • Scan for Codes: Use an OBD-II scanner to confirm that no transmission-related codes are present.

What to Look/Listen For

  • Listen for any unusual noises from the transmission.
  • Pay attention to how the transmission shifts under different driving conditions (acceleration, deceleration, uphill, downhill).
  • Monitor fuel economy to ensure it's within the normal range.

FAQ

Q: Will this TCM need to be programmed?
A: Some TCMs require programming to match your vehicle's specific VIN. Check with your mechanic or the seller to determine if programming is necessary.

Q: How do I know if my TCM is bad?
A: Common symptoms include erratic shifting, transmission slipping, a Check Engine Light, and being stuck in limp mode. A diagnostic scan can confirm if the TCM is the problem.

Q: Is it difficult to replace a TCM myself?
A: Replacing a TCM can be moderately difficult, depending on your mechanical skills. If you're not comfortable working on cars, it's best to have a professional mechanic do the job.

Q: What's the difference between a used OEM and a new aftermarket TCM?
A: A used OEM TCM is a genuine factory part that has been tested and inspected. A new aftermarket TCM is a brand new part manufactured by a third-party company.

Q: How long will a TCM last?
A: A TCM can last for the life of the vehicle, but its lifespan can vary depending on several factors. A typical lifespan is 100,000-150,000 miles or 7-10 years.

Part Specifications

OEM Part Numbers:

  • GM: 24044614, 24046814, 24049861, 24290348, 24292659, 24297413

Fits Years: 2021 2022 2023 2024 2025

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