What kind of transmission does your 2005 Chevy Suburban 4x4 5.3 liter vortec have?
A 2005 Chevy Suburban 4x4 with a 5.3L Vortec engine typically came with either a 4L60E four-speed automatic transmission or a 4L70E four-speed automatic transmission. There's no way to know for sure without checking the vehicle's documentation or the transmission itself.