2018 2500RL - Anyone have a Brochure/Spec sheet? Differences between 2018 and 2021?

[SoCalAngler]

Hello all--

New to site. Posted about a 2400BH for 4 adults. Bunks may be more for kids so we are now considering the 2500RL.

Found a used 2018 2500RL near me.

Does anyone have an Official GD 2018 Brochure and/or spec sheet they'd be willing to share? You can email if needed ([email protected]).

What differences are there!

Any major changes such as frame construction, exterior fiberglass walls composition and insulation (not sure any year is Azdel), roofing material, chassis construction, capacities of holding tanks, axles, etc?

Also, were the mandatory packages in play in 2018....Piece of Mind, Ultimate Power, and Four Season Protection Packages?

Also, 8cu ft refer, 15K AC, etc...

R-Values in Roof, Floor, and Walls?

What should I be looking for during my inspection for this particular model?

Thanks!