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How do you replace the alternator on a 1999 Chevy Blazer S-10 4wd?

Replacing the alternator in a 1999 Chevy Blazer S-10 4wd involves the following steps:

1. Gather Tools and Parts:

- Replacement alternator

- Socket wrench set

- Pliers

- Screwdriver

- New Serpentine belt (if needed)

- Safety glasses

2. Disconnect the Battery:

- Open the hood and disconnect the negative terminal on the battery using the wrench.

3. Locate the Alternator:

- The alternator is usually mounted on the front of the engine, near the top.

4. Disconnect Electrical Connectors:

- Disconnect the electrical connectors attached to the alternator by pressing down on the locking tabs and pulling them off.

5. Loosen the Serpentine Belt:

- Use a wrench to loosen the tensioner pulley and remove the serpentine belt.

6. Remove Mounting Bolts:

- Locate and remove the mounting bolts holding the alternator to the engine. There are usually two or three bolts.

7. Remove the Alternator:

- Once the mounting bolts are removed, you should be able to lift out the old alternator.

8. Install the New Alternator:

- Place the new alternator in its original position and secure it with the mounting bolts you removed earlier.

9. Reconnect Electrical Connectors:

- Reconnect the electrical connectors you disconnected earlier.

10. Reinstall the Serpentine Belt:

- Reinstall the serpentine belt by placing it around the pulleys and tensioning it with the tensioner pulley.

11. Reconnect the Battery:

- Reconnect the negative terminal on the battery.

12. Test the Alternator:

- Start the engine and check that the alternator charging light on the dashboard turns off, indicating the alternator is working correctly.

13. Check and Adjust Belt Tension (if necessary):

- Ensure the serpentine belt tension is correct as per the vehicle specifications. Adjust if needed.

14. Cleanup and Verify:

- Clean up any tools or parts and ensure all connections are secure.

Note: Always refer to the vehicle's service manual for specific instructions and torque specifications related to your model and year.