OEM Navigation Control Module for 1999-2000 Cadillac, Chevrolet, GMC, & Oldsmobile

What to Look For When Buying:

• Compatibility: Ensure the module is specifically designed for your vehicle's year, make, and model.
• Condition: Carefully examine the module for any signs of physical damage, corrosion, or tampering.
• Warranty: Check if the part comes with a warranty for peace of mind.
• Seller Reputation: Buy from a reputable seller with positive reviews and a clear return policy.

Quality Indicators:

What's Typically Included:

• The Navigation Control Module itself.
• Mounting hardware may or may not be included (verify with seller).
• Installation instructions are usually NOT included.

Difficulty Level: Medium

Estimated Time: 1-2 hours

Special Tools Needed:

• Basic hand tools (sockets, wrenches, screwdrivers)
• Trim removal tools (to avoid damaging interior panels)
• Multimeter (for testing power and ground)
• Scan tool (for clearing diagnostic codes)

Critical Steps and Tips:

1. Disconnect the negative battery cable before starting any electrical work.
2. Locate the Navigation Control Module: Consult your vehicle's repair manual for the exact location. It's often behind the dashboard or in the center console.
3. Carefully disconnect all wiring connectors from the module.
4. Remove any mounting hardware securing the module.
5. Install the new module in the reverse order of removal.
6. Reconnect the negative battery cable.
7. Test the navigation system to ensure it is working properly.
8. Clear any diagnostic trouble codes (DTCs) using a scan tool.

DIY or Professional Installation:

• DIY is possible for mechanically inclined individuals with experience working on car electronics.
• Professional installation is recommended if you are not comfortable working with car electronics or if you lack the necessary tools.

Used OEM:

• Genuine factory parts, ensuring original equipment quality and fit.
• Tested and inspected to ensure they are in good working condition.
• Significantly lower prices compared to new parts.
• A great way to save money without sacrificing quality.

New Aftermarket:

• Brand new parts manufactured by third-party companies.
• Designed to meet or exceed original equipment specifications.
• Can be a good option if you prefer a new part and want to save money compared to buying from the dealer.

Parts Commonly Replaced or Checked:

• GPS Antenna: A faulty antenna can cause inaccurate GPS location.
• Wiring Harness: Damaged or corroded wiring can cause intermittent problems.
• Navigation Screen: A failing screen can prevent you from using the navigation system.
• Radio Head Unit: The navigation system often integrates with the radio, so a problem with the radio can affect the navigation system.

Preventing Repeat Failures:

• Replacing related parts at the same time can prevent future problems.
• For example, if the GPS antenna is corroded, replacing it along with the navigation control module can ensure a more reliable repair.
• Always inspect the wiring harness for damage and repair or replace it as needed.

How Long This Part Normally Lasts:

• A Navigation Control Module typically lasts 10-15 years or more under normal use.

Factors That Affect Longevity:

• Climate: Extreme temperatures and humidity can shorten the lifespan of electronic components.
• Driving Conditions: Rough roads and frequent vibrations can damage the module.
• Maintenance: Proper vehicle maintenance can help prevent electrical problems that can damage the module.
• Water Intrusion: Leaks or spills can cause corrosion and damage to the module.

Budget vs Mid-Range vs Premium Options:

• Used OEM: $50 - $150
• New Aftermarket: $100 - $250

Labor Cost Considerations:

• Professional installation typically costs $100 - $300, depending on the shop and the complexity of the job.

Total Job Cost Estimates:

• DIY (Used OEM): $50 - $150 (parts only)
• Professional Installation (Used OEM): $150 - $450 (parts and labor)
• DIY (New Aftermarket): $100 - $250 (parts only)
• Professional Installation (New Aftermarket): $200 - $550 (parts and labor)

Known Issues:

• Some vehicles from this era are known to have issues with water leaks that can damage electronic components, including the navigation control module. Check for signs of water damage before replacing the module.
• The GPS antenna connector can become corroded, leading to poor GPS signal reception.

TSBs and Common Complaints:

• Check for any Technical Service Bulletins (TSBs) related to the navigation system on your specific vehicle. These bulletins may provide helpful information about diagnosing and repairing common problems.

How to Confirm Proper Operation:

• Power On: Verify that the navigation system powers on and displays the map screen.
• GPS Signal: Check that the system acquires a GPS signal and displays your current location accurately.
• Navigation Functionality: Test the navigation features by entering a destination and following the directions.
• Audio Prompts: Make sure the audio prompts are clear and audible.

What to Look/Listen For:

• Smooth Operation: The navigation system should operate smoothly and without any glitches or freezes.
• Accurate Location: The displayed location should match your actual location.
• Clear Audio: The audio prompts should be clear and easy to understand.
• No Error Messages: There should be no error messages displayed on the screen.

Q: Will this module need to be programmed after installation?
A: In most cases, this module does not require programming. However, it's always a good idea to check with your local mechanic or dealer to confirm.

Q: How do I know if my GPS antenna is bad?
A: Signs of a bad GPS antenna include difficulty acquiring a GPS signal, inaccurate location data, and error messages related to the GPS antenna.

Q: What if the replacement module doesn't fix the problem?
A: If the replacement module doesn't fix the problem, there may be another issue with your navigation system, such as a faulty wiring harness or a problem with the radio head unit. Further diagnosis is needed.

Q: Can I return the module if it doesn't work?
A: Check the seller's return policy before purchasing the module. Most reputable sellers offer a return policy for defective or incompatible parts.

Q: Is it difficult to remove the old module?
A: The difficulty of removing the old module depends on the vehicle. Some vehicles have easy access to the module, while others require more disassembly. Consult your vehicle's repair manual for specific instructions.

OEM Part Numbers:

• GM: 09376149, 09382629, 9376149

Fits Years: 1999 2000