On these GM 3400 engines the alternator is on top rear of the engine bay. You have to remove the motor mounts to drop the motor enough to get it out. I did it on my BIL van so I wasn’t pulling my hair out this time. I also bought new motor mounts a while back because when I did the serpentine belt the one was oozing. While I wait until Sunday when new one arrives I’m going to enjoy my anniversary or what’s left. 7 year and counting.
See you tomorrow maybe. Posting from tablet so photos are wonky.