OEM Telematics Control Module for 2002-2004 Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, & Saturn

• What to Look For: Make sure the part is the correct type for your car's make, model, and year.

• What to Look For: Check the part for any signs of damage, such as cracks or corrosion.

• Quality Indicator: For used parts, look for parts that have been tested and inspected.

• Quality Indicator: Check if the seller offers a warranty or return policy.

• What's Included: The telematics control module itself. You may need to reuse existing brackets or hardware from your old module.

• Difficulty Level: Medium. Some mechanical knowledge and experience with car electronics are helpful.

• Estimated Time: 1-2 hours.

• Special Tools: Basic hand tools (sockets, wrenches, screwdrivers), a scan tool to clear any diagnostic trouble codes after installation.

• Critical Steps:

1. Disconnect the negative battery cable.
2. Locate the telematics control module (usually under the dash or in the trunk).
3. Disconnect the wiring harness from the module.
4. Remove the old module.
5. Install the new module.
6. Reconnect the wiring harness.
7. Reconnect the negative battery cable.
8. Use a scan tool to clear any diagnostic trouble codes.

• Tip: Take pictures of the wiring connections before disconnecting them to help you remember how to reconnect them.

• Recommendation: DIY is possible for mechanically inclined individuals. If you're not comfortable working with car electronics, professional installation is recommended.

• Used OEM: These are original parts taken from other vehicles.
• Benefit: They are genuine factory parts, ensuring a good fit and performance.
• Benefit: They are tested and inspected to ensure they are working properly.
• Benefit: They are available at a significantly lower price than new parts.

• New Aftermarket: These are brand new parts made by third-party manufacturers.
• Benefit: They are brand new and haven't been used before.
• Benefit: They are built to meet or exceed original equipment (OE) specifications.
• Benefit: They are often more affordable than new OEM parts.

• Battery: A weak or failing battery can cause problems with the telematics system.
• Wiring Harness: Damaged or corroded wiring can prevent the module from working properly.
• Antenna: The telematics system relies on an antenna to communicate with satellites and cell towers.

• Reason: Replacing related parts at the same time can prevent repeat failures and ensure the telematics system works properly. A bad battery can damage a new module. Corroded wires can cause intermittent problems.

• How Long: 5-10 years.

• Factors:
• Exposure to moisture and extreme temperatures.
• Electrical surges.
• The overall condition of the car's electrical system.

• Used OEM: $50 - $150
• New Aftermarket: $100 - $250
• Labor Cost: $75 - $150
• Total Job Cost: $125 - $400

• Known Issue: Some vehicles may experience issues with the telematics system after a software update.
• Known Issue: Water leaks in the trunk can damage the telematics control module in some models.
• TSB: Check for any Technical Service Bulletins (TSBs) related to the telematics system on your specific vehicle. These bulletins may provide information about common problems and solutions.

• How to Confirm:

1. Start the car and check for any error messages related to the telematics system.
2. Test the OnStar or similar system by making a call or requesting directions.
3. Verify that the remote start and key fob functions are working properly.

• What to Look/Listen For:
• The OnStar light should be green, indicating that the system is active.
• You should be able to hear the OnStar voice when you make a call.
• The remote start should start the car without any problems.

• Q: Will this module need to be programmed?
• A: It depends. Some modules may require programming to match your car's VIN. Check with a mechanic or dealer to confirm.

• Q: How do I know if this is the right part for my car?
• A: Check the part numbers on your old module. Make sure the replacement module has the same part numbers.

• Q: What if the new module doesn't fix the problem?
• A: There may be other issues with the telematics system, such as a faulty antenna or wiring problem. Have a mechanic diagnose the problem further.

• Q: Can I return the module if it doesn't work?
• A: Check the seller's return policy before you buy the module. Most sellers offer a return policy if the part is defective.

• Q: Where is the telematics control module located in my car?
• A: The location varies depending on the make and model of your car. It's often located under the dashboard, in the trunk, or behind the glove box. Consult your car's repair manual for the exact location.

OEM Part Numbers:

• Other: 12451210, 15181835, 25737700, 25740426, 25742967, 25751433, 25765618, 2577, 25772965

Fits Years: 2002 2003 2004