What was towing package on '93 Lumina APV

We have a '93 Lumina APV that has had excellant care. Recently we have been thinking about purchasing a small pop up camper. Our Lumina does not have the factory towing package that was available at that time. I'm trying to find out what the package included.

I was planning on just installing a transmission cooler and oil cooler. But have been advised that some manufacturers might have used heavier axles, beefier suspension, different computer or settings, etc.

So I am trying to find out what additional equipment was installed as part of the factory towing package

Thanks

a bigger price tag ha ha ha