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Body Control Module

2002 - 2006 Chevrolet Trailblazer Telematics Control Module (OEM)

✓ IN STOCK
$59.95

ℹ️ Product Notes

This is a used part. It is the communication module that controls your vehicle's OnStar system. This part is also known as the Chassis Control Module and matches the GM option code UE1.

Fits models with OnStar (Option UE1). This module may require dealer programming to link it to your vehicle's VIN.
Condition: Excellent (A)
Like new, minimal to no wear
75,639 miles
Odometer reading when part was removed
SKU #
429996-03070-195

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 2002-2006 (tapclick to expand)(tapclick to hide)
Swipe left/right to see more info
SubmodelSUB-
MODEL		 Body Style Years Engine Attributes
LS SUV 2002 - 2006 L6 4.2L RWD/4WD | Automatic
LT SUV 2002 - 2006 L6 4.2L RWD/4WD | Automatic
LTZ SUV 2002 - 2003 L6 4.2L RWD/4WD | Automatic
North Face SUV 2002 - 2004 L6 4.2L RWD/4WD | Automatic
Base SUV 2003 - 2006 L6 4.2L RWD | Automatic
A SUV 2004 - 2006 L6 4.2L RWD | Automatic
B SUV 2004 - 2006 L6 4.2L RWD | Automatic
Q SUV 2005 L6 4.2L RWD | Automatic
R SUV 2005 L6 4.2L RWD | Automatic
B SUV 2006 L6 4.2L 4WD | Automatic
LS SUV 2006 V8 5.3L RWD/4WD | Automatic
LT SUV 2006 V8 5.3L RWD/4WD | Automatic
SS SUV 2006 V8 6.0L AWD/RWD | Automatic

⚠️ 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 Telematics Control Module:

  • Your car's OnStar or similar telematics system stops working.
  • You get error messages on your dashboard related to communication or security systems.
  • The car's remote start feature malfunctions.
  • The door locks or alarm system start acting erratically.
  • The vehicle's battery drains quickly.

Testing the Telematics Control Module:

It's important to make sure the telematics control module (TCM) is actually the problem before replacing it. Here's how to narrow it down:

  1. Check the basics: Make sure your car's battery is fully charged and the fuses related to the telematics system are good.
  2. Scan for codes: Use an OBD-II scanner to check for diagnostic trouble codes (DTCs) related to the telematics system. These codes can give you clues about what's wrong.
  3. Inspect the wiring: Look for any damaged or corroded wires and connectors going to the TCM.
  4. Consult a professional: If you're not comfortable doing these tests yourself, take your car to a qualified mechanic. They have the tools and expertise to diagnose the problem accurately.

Common Causes of TCM Failure:

  • Water damage: Leaks or flooding can damage the TCM's internal components.
  • Electrical surges: Power surges can fry the TCM's circuits.
  • Corrosion: Corrosion can build up on the TCM's connectors, causing them to fail.
  • Age: Like any electronic component, the TCM can simply wear out over time.
  • Accident Damage: A collision can physically damage the TCM.

Buyer's Checklist

What to Look for When Buying a TCM:

  • Correct part: Make sure the TCM is compatible with your car's year, make, and model.
  • Condition: If buying a used TCM, ask about its condition and history.
  • Warranty: Check if the TCM comes with a warranty.

Quality Indicators:

FeatureUsed OEMNew Aftermarket
OriginOriginal equipment from the manufacturerMade by a third-party manufacturer
TestingTypically tested before resaleBrand new, but may have varying quality control
PriceGenerally lower than new aftermarketCan be comparable or slightly higher than used
ReliabilityKnown reliability of the original equipmentReliability can vary by manufacturer

What's Included:

  • The telematics control module itself.
  • Sometimes, mounting hardware may be included, but often you'll reuse your existing hardware.

Installation Overview

Difficulty Level and Estimated Time:

Replacing a TCM is generally considered a moderate difficulty job. It can take anywhere from 1 to 3 hours, depending on your experience and the location of the TCM in your vehicle.

Special Tools Needed:

  • Basic hand tools (sockets, wrenches, screwdrivers)
  • OBD-II scanner (to clear any trouble codes after installation)
  • Possibly a trim removal tool (to access the TCM)

Critical Steps and Tips:

  1. Disconnect the battery: Always disconnect the negative battery cable before working on any electrical components.
  2. Locate the TCM: Consult your car's repair manual to find the TCM's location. It's often located under the dashboard, in the center console, or in the trunk.
  3. Remove the old TCM: Disconnect the wiring harness and remove any mounting hardware.
  4. Install the new TCM: Connect the wiring harness and secure the TCM with the mounting hardware.
  5. Reconnect the battery: Reconnect the negative battery cable.
  6. Clear trouble codes: Use an OBD-II scanner to clear any trouble codes that may have been triggered.

DIY or Professional Installation?

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

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. They're available at significantly lower prices than new parts.

New Aftermarket:

New aftermarket TCMs are brand new parts made by third-party manufacturers. They are designed to meet or exceed the original equipment specifications.

FeatureUsed OEMNew Aftermarket
PriceLowerCan be comparable or slightly higher than used
ConditionUsed, testedNew
OriginOriginal equipment manufacturerThird-party manufacturer
WarrantyVaries by sellerVaries by seller

Typical Lifespan

How Long Does a TCM Last?

A TCM typically lasts for 10-15 years or more.

Factors Affecting Longevity:

  • Operating environment: Extreme temperatures and humidity can shorten the TCM's lifespan.
  • Electrical surges: Power surges can damage the TCM.
  • Maintenance: Keeping your car's electrical system in good condition can help extend the TCM's lifespan.

Price Ranges

Budget vs. Mid-Range vs. Premium:

  • Used OEM: $50 - $200
  • New Aftermarket: $100 - $300

Labor Cost Considerations:

Labor costs to install a TCM 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: $150 - $500 (parts + labor)
  • New Aftermarket: $200 - $600 (parts + labor)

Vehicle-Specific Notes

Known Issues:

Some vehicles in this range have reported issues with water intrusion affecting the TCM, especially those located in the trunk area. Check for signs of water damage before replacing the module.

TSBs and Common Complaints:

Research if there are any Technical Service Bulletins (TSBs) related to the TCM for your specific vehicle model. These bulletins can provide valuable information about common problems and solutions.

Verification After Install

How to Confirm Proper Operation:

  • Start the car and check for any error messages on the dashboard related to the telematics system.
  • Test the OnStar or similar telematics system to make sure it's working properly.
  • Test the remote start feature, door locks, and alarm system.

What to Look/Listen For:

  • Make sure the telematics system connects to the network.
  • Verify that the remote start feature works as expected.
  • Check that the door locks and alarm system function correctly.
  • Listen for any unusual noises coming from the TCM.

FAQ

Q: Will this TCM need to be programmed?
A: Some TCMs may require programming to match your car's specific settings. Check with a mechanic or the seller to confirm if programming is necessary.

Q: How do I know if this TCM will fit my car?
A: Make sure to check the part's compatibility with your car's year, make, and model.

Q: What if the TCM I receive is defective?
A: Check the seller's return policy before buying. Most reputable sellers offer returns or exchanges for defective parts.

Q: Can I install this TCM myself, or do I need a mechanic?
A: If you have experience working on cars and are comfortable with electrical systems, you may be able to install it yourself. Otherwise, it's best to have a professional install it.

Q: What kind of warranty does this TCM come with?
A: Warranty coverage varies by seller. Check the seller's warranty policy before buying.

Part Specifications

OEM Part Numbers:

  • GM: 10394074, 10396911, 12451209, 12451437, 15098277, 15795953, 15812977, 15952361, 19115461, 19115774, 22705039, 89047017

Fits Years: 2002 2003 2004 2005 2006

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