Here's a general overview of the process. This is NOT a substitute for a proper repair manual:
1. Safety First:
* Disconnect the battery: This prevents accidental shorts.
* Use jack stands: Never work under a vehicle supported only by a jack.
* Wear safety glasses and gloves: Protect yourself from potential hazards.
2. Preparation:
* Identify the driveshaft: Determine if you need to replace the front, rear, or both driveshafts. Blazers are typically rear-wheel drive or 4x4.
* Gather tools: You'll need jack stands, a jack, socket wrench set (including metric and possibly SAE), a torque wrench, a pry bar, possibly a driveshaft support, penetrating oil, and safety equipment.
* Locate service manuals: Obtain a Haynes or Chilton repair manual specific to your 2000 Chevy Blazer.
3. Removal:
* Support the vehicle: Securely lift and support the Blazer using jack stands.
* Disconnect the driveshaft: This will involve removing bolts connecting the driveshaft to the transmission and differential. Penetrating oil might be needed to loosen stubborn bolts. You may need to support the driveshaft to prevent it from falling.
* Remove the driveshaft: Carefully lower the driveshaft. Take note of its orientation and any markings to ensure correct reinstallation.
4. Installation:
* Inspect the new driveshaft: Ensure it's the correct part for your Blazer.
* Install the driveshaft: Carefully align the new driveshaft with the transmission and differential.
* Connect the driveshaft: Securely bolt the driveshaft to both ends, ensuring proper alignment. Use a torque wrench to tighten the bolts to the manufacturer's specifications (found in your repair manual).
* Lower the vehicle: Carefully lower the Blazer to the ground.
5. Verification:
* Check for leaks: Inspect for any leaks around the driveshaft connections.
* Test drive: Test drive the Blazer to ensure the driveshaft is functioning correctly. Listen for any unusual noises.
Important Considerations:
* U-joints: If you're replacing the driveshaft due to a failed U-joint, you may be able to replace just the U-joint instead of the entire shaft. This is often a less expensive repair, but it still requires specialized tools and knowledge.
* Balance: Driveshafts often need to be balanced after repair or replacement to avoid vibrations. A professional shop may be needed for this step.
* 4x4 Systems: Replacing a driveshaft on a 4x4 Blazer is more complex due to the additional components involved in the transfer case.
This is a simplified overview. The actual process may vary significantly depending on your Blazer's specific configuration and the condition of the surrounding components. Always refer to your repair manual for detailed, step-by-step instructions and torque specifications. If you are not comfortable performing this repair yourself, it's best to take your Blazer to a qualified mechanic. Improper installation can lead to serious damage to your vehicle and potential injury.
