OEM Telematics Control Module for 2002-2007 Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, & Saturn

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:

What's Included:

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

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.

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.

Parts Commonly Replaced or Checked:

• Battery: A weak battery can cause electrical problems that affect the TCM.
• Fuses: Blown fuses can prevent the TCM from working properly.
• Wiring harness: Damaged wiring can cause communication problems.
• Antenna: The telematics antenna is used for communication.

Why Replace Related Parts?

Replacing related parts can help prevent repeat failures. For example, if a weak battery caused the original TCM to fail, replacing the battery along with the TCM can prevent the new TCM from failing prematurely.

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.

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)

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.

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.

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.

OEM Part Numbers:

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

Fits Years: 2002 2003 2004 2005 2006 2007