Tire size question

[CoastalG]

I have an '07 Avalanche and am looking to go up tire size. I'm looking at 275/60/20 and I have the leveling kit already installed. Does anyone know if I can fit these on without having rubbing?

 

[BainMan]

How many inches did the level kit add? Stock wheels? If not stock wheels, what is the backspacing?

According to Offroaders.com You'll need a 2.5" suspension lift to run 33's.

 

[avamineral]

I have an '07 Avalanche and am looking to go up tire size. I'm looking at 275/60/20 and I have the leveling kit already installed. Does anyone know if I can fit these on without having rubbing?

Not sure my 2007 has 275/55/20 ... my guess is 60 might rub.