OEM Communication Control Module for 2019-2022 Buick, Cadillac, Chevrolet, & GMC

What to Look For:

• Compatibility: Ensure the part is designed for your specific year, make, and model vehicle.
• Condition: Carefully inspect the part for any signs of damage or wear.
• Warranty: Look for a warranty to protect against defects or premature failure.
• Seller Reputation: Purchase from a reputable seller with positive reviews and a history of selling quality parts.

Quality Indicators:

What's Included:

• The Communication Control Module itself.
• Sometimes, mounting hardware (check with the seller).
• Wiring harness or connectors are typically NOT included.

Difficulty Level:

• Moderate to Advanced. This job often requires specialized tools and knowledge of vehicle electrical systems.

Estimated Time:

• 1-3 hours, depending on experience and vehicle accessibility.

Special Tools Needed:

• Socket set
• Wrench set
• Screwdrivers
• OBD-II scanner
• Multimeter (for testing voltage and continuity)
• Wiring diagram (specific to your vehicle)

Critical Steps and Tips:

1. Disconnect the Battery: Always disconnect the negative battery cable before working on any electrical components.
2. Locate the Module: Refer to your vehicle's service manual to find the location of the Communication Control Module.
3. Disconnect Connectors: Carefully disconnect the wiring harness connectors from the module.
4. Remove the Module: Unbolt or unclip the module from its mounting bracket.
5. Install the New Module: Install the new module in the reverse order of removal.
6. Reconnect the Battery: Reconnect the negative battery cable.
7. Program the Module: The new module may need to be programmed or configured to your vehicle using a diagnostic scanner.

DIY or Professional Installation:

• Professional installation is recommended, especially if you are not comfortable working with vehicle electrical systems or if programming is required. Incorrect installation can damage the module or other vehicle components.

Used OEM:

• Pros: Genuine factory part, typically tested and inspected, lower price than new.
• Cons: May have some wear and tear, limited warranty.

New Aftermarket:

• Pros: Brand new, often comes with a warranty, readily available.
• Cons: Quality can vary, may not fit or function exactly like the original.

Parts Commonly Replaced or Checked:

• Wiring Harness: Inspect the wiring harness and connectors for any damage or corrosion.
• Fuses and Relays: Check the fuses and relays related to the communication system.
• Other Control Modules: If one module fails, it's a good idea to check other related control modules for potential issues.

Preventing Repeat Failures:

• Replacing related parts can help prevent repeat failures by addressing underlying issues that may have contributed to the original module's failure. For example, a faulty wiring harness can cause electrical surges that damage the module.

How Long This Part Normally Lasts:

• A Communication Control Module typically lasts 8-12 years or 100,000-150,000 miles.

Factors That Affect Longevity:

• Environmental Conditions: Exposure to moisture, heat, and vibration can shorten the lifespan of the module.
• Electrical System Health: A healthy electrical system with a stable voltage supply can help prolong the module's life.
• Driving Habits: Aggressive driving and frequent short trips can put stress on the electrical system and reduce the module's lifespan.

Budget vs Mid-Range vs Premium:

• Used OEM: $50 - $200
• New Aftermarket: $150 - $400

Labor Cost Considerations:

• Labor costs can range from $100 to $300, depending on the shop and the complexity of the installation.

Total Job Cost Estimates:

• Used OEM: $150 - $500 (part + labor)
• New Aftermarket: $250 - $700 (part + labor)

Known Issues:

• Some 2018-2022 Chevrolet and GMC vehicles have experienced issues with the Communication Control Module due to software glitches or faulty components.

TSBs or Common Complaints:

• Check for any Technical Service Bulletins (TSBs) related to communication issues on your specific vehicle model. Common complaints include intermittent loss of communication, warning lights, and issues with electronic systems.

How to Confirm Proper Operation:

• Use an OBD-II scanner to check for any trouble codes.
• Verify that all electronic systems are functioning properly, such as the radio, navigation, and driver assistance features.

What to Look/Listen For:

• No warning lights on the dashboard.
• Smooth and reliable communication between all vehicle modules.
• Proper operation of all electronic systems.

Q: How do I know if my Communication Control Module is bad?
A: Common signs include warning lights, communication errors with diagnostic tools, and issues with electronic systems like the radio or navigation.

Q: Can I replace the Communication Control Module myself?
A: It's possible, but professional installation is recommended due to the complexity of the system and the need for programming.

Q: Will a used Communication Control Module need to be programmed?
A: It might. Some modules require programming to match your vehicle's specific configuration. Check with the seller or a qualified technician.

Q: What is the difference between a used OEM and a new aftermarket Communication Control Module?
A: A used OEM module is a genuine factory part that has been previously used, while a new aftermarket module is a brand new part made by a third-party manufacturer. OEM parts are generally considered to be more reliable, but aftermarket parts can be more affordable.

Q: How long should a Communication Control Module last?
A: Typically 8-12 years or 100,000-150,000 miles, but this can vary depending on environmental conditions and driving habits.

OEM Part Numbers:

• GM: 84383279, 84443923, 84557346, 84578113, 84600180, 84644344

Fits Years: 2019 2020 2021 2022