I have heard of people having the same problem with Haynes manual as I did with Chilton. For my 95 lesabre, replacing the Harmonic balancer was a nice learning experience. Chilton manual refers to the balancer as crankshaft vibration damper. It also told me I could pull it off by hand, slap the new one on there and tighten it up. Bad Idea. Be sure to get the right kind of puller, installer, and put some oil on it. Oh yeah. And make darn sure the new one they give you at the store is the correct one. Carquest sold me one that looked like it had been installed and then removed as a "brand new part". And, it was not the right one, glad I looked it over before I drove away from the store.

For us beginners, to put it in light terms, this is important info I would have liked to have. Oh yeah, use a screwdriver or something to stop the flexplate. Chilton does show that part. There is a little cover right snug against the oil pan, 2 screws, pops right out, and be sure not to strip them on the way back in (like I did). That will keep the darn thing from turning when trying to tighten.

You would have been far better off coming here and asking. Because then I would have given you this link, https://www.gmforum.com/mechanical-134/harmonic-balancer-replacement-286278/

Oh yeah, I realize this now, which is why I finally made an account. Thank you. Very helpful

One other thing... I found that the listings for 95 are not correct in most parts stores.

The universal installers do not work. they do not fit through the hole on the balancer. Little bit of anti-sieze did wonders though. The bolt threads on enough and it slides easy enough to go on there with just that. Also I had thought all 95s had series 1 engines. But they do not? Such a messed up transitional year. Might that have anything to do with stores not giving the right parts?