2019 - 2024 Chevrolet Blazer Climate Control Module (OEM)

What to Look for When Buying a Climate Control Module:

• Correct Part: Make sure the module is the correct one for your vehicle's year, make, and model.
• Functionality: If buying a used module, confirm it has been tested and is working properly.
• Physical Condition: Check for any signs of damage, such as cracks, dents, or corrosion.
• Warranty: Look for a warranty to protect against defects or failures.

Quality Indicators:

What's Included:

• The climate control module itself.
• Sometimes, mounting hardware (screws or clips).

Difficulty Level and Estimated Time:

• Difficulty: Medium
• Estimated Time: 1-2 hours

Special Tools Needed:

• Screwdrivers (Phillips and flathead)
• Socket set
• Panel removal tools (optional)

Critical Steps and Tips:

1. Disconnect the Battery: Always disconnect the negative battery cable before working on electrical components.
2. Remove the Old Module: Carefully remove the trim panels around the climate control module. Disconnect the wiring harness and remove the old module.
3. Install the New Module: Connect the wiring harness to the new module. Install the module in the dashboard and secure it with the mounting hardware.
4. Reinstall Trim Panels: Reinstall the trim panels around the climate control module.
5. Reconnect the Battery: Reconnect the negative battery cable.

DIY or Professional Installation:

• DIY is possible for mechanically inclined individuals.
• Professional installation is recommended if you are not comfortable working on electrical components or removing trim panels.

Compare: Used OEM vs. New Aftermarket

Used OEM:

• Best value for money.
• Genuine factory parts, made by the original manufacturer.
• Tested and inspected to ensure they are working properly.
• Significantly lower price than new parts.

New Aftermarket:

• Brand new parts made by third-party manufacturers.
• Built to meet or exceed OE specifications.
• Can be a good option if you want a new part and are on a budget.

Parts Commonly Replaced or Checked:

• Blower Motor: The blower motor circulates air through the HVAC system. If it's not working properly, you won't get any air from the vents.
• Blower Motor Resistor: This resistor controls the speed of the blower motor. If it fails, the fan may only work on certain speeds.
• Actuators: Actuators control the flow of air to different vents and adjust the temperature.
• Fuses and Relays: Check all fuses and relays related to the HVAC system.

Why Replace Related Parts:

• Replacing related parts can prevent repeat failures. For example, a failing blower motor can put extra strain on the climate control module. Replacing both parts at the same time can prevent the new module from failing prematurely.

How Long This Part Normally Lasts:

• A climate control module typically lasts 8-12 years or more.

Factors That Affect Longevity:

• Driving Conditions: Extreme temperatures and humidity can shorten the lifespan of the module.
• Maintenance: Regular maintenance, such as cleaning the interior of the vehicle, can help extend the lifespan of the module.
• Electrical Issues: Electrical surges or shorts can damage the module.

Budget vs. Mid-Range vs. Premium Options:

• Used OEM: $75 - $200
• New Aftermarket: $150 - $350

Labor Cost Considerations:

• Labor costs for installation typically range from $100 to $300, depending on the mechanic's hourly rate and the complexity of the job.

Total Job Cost Estimates:

• Used OEM: $175 - $500 (part + labor)
• New Aftermarket: $250 - $650 (part + labor)

Known Issues:

• Some 2019-2024 Buick, Cadillac, Chevrolet, and GMC vehicles have reported issues with the climate control module causing intermittent loss of HVAC functions. This is often related to internal component failure within the module itself.
• Check for any Technical Service Bulletins (TSBs) related to climate control issues for your specific vehicle model and year.

How to Confirm Proper Operation:

• Turn on the ignition and start the engine.
• Turn on the air conditioning and heat.
• Check that the air is blowing from the correct vents.
• Adjust the temperature and fan speed to ensure they are working properly.
• Check the display screen to make sure it is working correctly.

What to Look/Listen For:

• Listen for the blower motor to start and run smoothly.
• Feel for cold air coming from the vents when the AC is on.
• Feel for hot air coming from the vents when the heat is on.
• Make sure the temperature changes as you adjust the controls.
• Ensure all buttons and controls on the module are responsive.

Q: How do I know if my climate control module is bad?
A: Common signs include the AC or heat not working, the fan only working on certain speeds, a blank display screen, or unresponsive buttons.

Q: Can I replace the climate control module myself?
A: Yes, if you are comfortable working on electrical components and removing trim panels. Otherwise, professional installation is recommended.

Q: Will a used OEM climate control module work as well as a new one?
A: Yes, used OEM modules are tested and inspected to ensure they are working properly. They are a good option for saving money.

Q: How long does a climate control module typically last?
A: A climate control module typically lasts 8-12 years or more, depending on driving conditions and maintenance.

Q: What is the difference between a used OEM and a new aftermarket climate control module?
A: A used OEM module is a genuine factory part, while a new aftermarket module is made by a third-party manufacturer. Used OEM modules are typically less expensive, while new aftermarket modules offer a new part.

OEM Part Numbers:

• Chevrolet: 84692740
• General Motors: 84249594, 84692594
• GMC: 84692742

Fits Years: 2019 2020 2021 2022 2023 2024