IMHO, you should have got the 4-point Equalizer, not the E-2.
i have one for my 23SS and my Avalanche has a longer wheelbase than your Tahoe and it works great.
have driven the Sierras, Cascades, Siskiyous and Rockies with it and never had an experience like yours.
even in a snow/ice storm in Wyoming, in November.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC