the alternator will be located close to the top of the motor, you will need to loosen the tensioner pulley and remove the serpentine belt, disconnect the elictrical connections at the alternator and remove the alternator mounting bolts. then just lift the alternator out... as far as tools you will need a basic set of sockets and a screwdriver.
change the alternator batteries
Generally you would need to have a replacement alternator which is only around $60 and it is refurbished but a 1999 Chevy Tahoe alternator should work just as well
Remove the fuel tank for access
Replace and bleed line
No, You will have to remove the fuel tank.
Your 1999 Chevy blazer doesn't have a timing belt.
How do I replace the alternator on my 1999 Kia Sportage
Will a 1997 blazer what work on a 1999 blazer????? If your talking engine, transmission, or running gear than yes. It is all the same.
Service brakes - replace Master cylinder Parking brake- either lubricate or replace cables ; I had a similar problem with my 1999 Chevy blazer, i ended up replacing the caliper and have had no problems since.
Check related answers. There are several responses and are quite accurate.
How to change the bulbs in the climate control for a 1999 Chevy trailblazer
It is built into the alternator NEUTZ