first, you need to post better specs/numbers.
is the trailer's 6300 number the website/brochure "dry" number or the actual UVW sticker weight from the factory?
need more info on the Caddy: engine size, payload amount, rear end ratio and so on. where did you get the 7800 number?
rarely does a 1/2 ton vehicle like the Escalade, have lots of payload.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC