Greetings from the Florida Panhandle
Welcome to the Forums. We're glad to have you with us
Your Suburban should be able to handle a late model 25' Airstream or smaller. It should also be able to handle just about any vintage Airstream since they are quite a bit lighter than the newer ones.
We have a 2005 Suburban 2500. We also had a 2005 25FB weighed in at 7,400# ready to camp.
If your Suburb an is set-up properly, it can be an effective to vehicle. If you are new to towing, you should start familiarizing yourself with hitch systems and trailer brake controllers.
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with HAHA
2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)