That'* OK in this one case. The Haynes is quite poor for our year'* Bonnevilles and is no help in this particular case. If you can possibly get the Chilton'* for your car, you would be much better off IMO. Or even better yet, buy a set of used Factory Service Manuals (FSMs) on ebay. If you plan on doing much work yourself, these are priceless and usually more than pay for themselves after the first use.

so, in order to remove the Sleeve, that bolt in front of it needs to come off?
Or how does that sleeve come off?

Look at the bolt in the pic. See how loose it is? Pull the bolt, then remove the sleeve. Please try to keep your posts about your problem in one topic.