Depending on what engine you have, it may be on the right side of the engine compartment, to the rear of the engine, or firewall side; or, it may be on the front of the engine. First step of course, disconnect the battery NEG/ground side of the battery cables to eliminate hazard; however, this will also reset your clock, radio, or other memory settings.
you replace it by...hold on
No
how to change an alternator
the belt only goes around the crank pulley and alternator pulley
Remove the belt from your 1993 Chevy G 20 alternator. Remove the alternator wiring harness. Remove the retaining bolts from the alternator. Reverse the process to install the new alternator.
The pcv valne is located is located right near the alternator in the 1993 Bonneville.
Remove the wiring harness from the back of your 1993 VW Jetta alternator. Remove the three alternator retaining bolts. Remove the alternator belt. Reverse the process to install your new alternator.
Bad bearings in the alternator. Best to just go ahead and replace it.
Inside the alternator itself
Raise the hood and look for the drive belt. The drive belt powers the alternator.
The voltage regulator is on the alternator, you'll have to take the alternator off to get at it.
Your alternator might be bad and not charging your battery properly.