2019 - 2022 Chevrolet Blazer Chassis Control Module (OEM)

When buying a Chassis Control Module, look for:

• Correct Part: Make sure the module is specifically designed for your vehicle's year, make, and model.
• Reputable Seller: Buy from a trusted source with good reviews and a warranty.
• Condition: Understand the condition of the part (used or new) and its implications.

Quality indicators:

• Testing: Used modules should be tested and verified to be in good working order.
• Warranty: A warranty provides protection against defects and failures.
• Appearance: Check for any signs of damage, corrosion, or tampering.

Typically included:

• The Chassis Control Module itself.
• Sometimes, installation instructions or diagrams (though these are often generic).

Difficulty level: Medium

Estimated time: 1-2 hours

Special tools needed:

• Socket set
• Screwdrivers
• Diagnostic scan tool (to clear codes after installation)

Critical steps and tips:

1. Disconnect the negative battery cable before starting.
2. Locate the Chassis Control Module (usually under the dashboard or in the engine compartment).
3. Disconnect the wiring harness from the module.
4. Remove the module from its mounting bracket.
5. Install the new module and reconnect the wiring harness.
6. Reconnect the negative battery cable.
7. Use a diagnostic scan tool to clear any error codes.

DIY is possible for mechanically inclined individuals, but professional installation is recommended for those unfamiliar with automotive electrical systems.

Here's a comparison of buying options:

• Used OEM: Genuine factory part, tested, lower price.
• New Aftermarket: Brand new, built to OE specs.

Used OEM:

• Pros: Lower cost, original equipment quality, typically reliable.
• Cons: May have some wear and tear, limited warranty.

New Aftermarket:

• Pros: Brand new, readily available, often comes with a longer warranty.
• Cons: May not be the exact same quality as the original OEM part.

Parts commonly replaced or checked at the same time:

• Suspension Sensors: These sensors provide data to the Chassis Control Module.
• Actuators: These components control the suspension and steering based on commands from the module.
• Wiring Harness: Damaged wiring can cause communication problems with the module.

Replacing related parts can prevent repeat failures by ensuring the entire system is functioning properly. A faulty sensor, for example, could send incorrect data to the module, causing it to malfunction.

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

Factors that affect longevity:

• Driving Conditions: Harsh conditions, such as extreme temperatures and rough roads, can shorten the lifespan.
• Maintenance: Proper vehicle maintenance can help prevent electrical problems that can damage the module.
• Electrical Issues: Electrical surges or shorts can damage the module.

• Used OEM: $150 - $400
• New Aftermarket: $250 - $600

Labor cost: $100 - $300 (depending on location and shop rates)

Total job cost:

• Used OEM: $250 - $700
• New Aftermarket: $350 - $900

Some 2020-2024 Cadillac and Chevrolet vehicles with adaptive suspension systems have experienced issues with the Chassis Control Module related to software glitches. Check for any Technical Service Bulletins (TSBs) related to your specific vehicle model and year. Some owners have reported issues with the module causing the suspension to become stiff or unresponsive.

To confirm proper operation:

1. Start the vehicle and check for any warning lights on the dashboard.
2. Drive the vehicle and observe the ride quality and handling.
3. Use a diagnostic scan tool to ensure there are no new error codes.

Listen for any unusual noises from the suspension or steering system. Verify that the suspension adjusts properly to different driving modes (if applicable). The vehicle should ride smoothly and handle predictably.

Q: How do I know if my Chassis Control Module is bad?
A: Common signs include a warning light, ride quality issues, suspension problems, and steering problems. A diagnostic scan can confirm the issue.

Q: Can I replace the Chassis Control Module myself?
A: It's possible if you have mechanical experience, but professional installation is recommended, especially if you need to program the new module.

Q: Will a used Chassis Control Module work in my car?
A: Yes, a used OEM module can work if it's the correct part for your vehicle and has been tested to be in good working order.

Q: Do I need to program the new Chassis Control Module?
A: Some modules may require programming to match your vehicle's specific configuration. Check with your mechanic or the part supplier.

Q: What is the warranty on a used Chassis Control Module?
A: Warranty periods vary depending on the seller. Look for a seller that offers at least a 30-day warranty.

OEM Part Numbers:

• GM: 13540164, 13540165

Fits Years: 2019 2020 2021 2022