I have a 2000 Buick Lesabre with the 3800 engine. How do you remove the rear spark plugs?

See what you can easily remove to create greater access. The link below will show you where I'm coming from:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-8.html#post1375876

I recommend that you only use the same ACDelco platinum plugs that came in the car.