Here's a general outline of the process. This isn't a complete, step-by-step guide, and specific steps might vary slightly depending on the exact Blazer model (2-door, 4-door, engine type). Consult a repair manual specific to your year and model for detailed instructions and diagrams.
1. Safety First:
* Evacuate the refrigerant: This is the most important step and should be done by a professional. Releasing refrigerant into the atmosphere is illegal and harmful. A qualified technician has the necessary equipment to safely recover the refrigerant.
* Disconnect the battery: This prevents accidental shorts and damage to electrical components.
* Wear safety glasses: Prevent debris from damaging your eyes.
* Use gloves: Protect your hands from sharp edges and potential contaminants.
2. Access the AC Compressor:
* You'll need to access the compressor, usually located on the engine's front, often near the lower part of the engine. This may require removing some components for better access. This could include:
* Serpentine belt: This needs to be removed. Use the appropriate tools and diagrams to avoid damaging components. Note belt routing before removal.
* Accessory components: Depending on your Blazer's layout, you might need to remove other components like the alternator or power steering pump (at least partially) to get a clear view and access.
* Consult your repair manual for the specific steps for your vehicle.
3. Remove the Old AC Clutch:
* Disconnect electrical connections: Disconnect the wiring harness connected to the AC clutch.
* Remove the clutch pulley: You'll likely need a clutch puller tool specifically designed for this task. This tool helps safely remove the clutch without damaging the compressor shaft.
* Remove the clutch assembly: Once the pulley is off, the clutch assembly should come off relatively easily.
4. Install the New AC Clutch:
* Install the new clutch assembly: Carefully align the new clutch with the compressor shaft.
* Install the pulley: Use the appropriate torque specifications to secure the pulley.
* Reconnect electrical connections: Securely reconnect the wiring harness.
5. Reassembly:
* Reinstall any removed components: Make sure everything is properly aligned and secured. Reinstall the serpentine belt, ensuring it's correctly routed.
* Reconnect the battery:
* Have the system recharged and checked for leaks: This is absolutely crucial. A professional technician will evacuate the existing air and moisture, vacuum the system to remove contaminants, and recharge it with the correct amount and type of refrigerant. They'll also check for leaks to prevent future problems.
Tools You Will Likely Need:
* Socket set (metric)
* Wrenches (metric)
* Ratchet and extensions
* AC clutch puller
* Torque wrench
* Serpentine belt removal tool
* Safety glasses
* Gloves
* Repair manual specific to your 2001 Chevy Blazer
Disclaimer: This is a general overview. Improperly performing this repair could lead to damage to your vehicle or personal injury. If you're not comfortable working on your vehicle, take it to a qualified mechanic. They have the expertise, tools, and refrigerant handling equipment to perform this repair safely and correctly.
