need more info about your Burb.
what's the payload amount, on the driver's door sticker?
does it have the factory tow package?
what rear end ratio does it have?
what's the approx. weight of passengers/cargo in the Burb?
have you purchased a WDH and brake controller yet?
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC