That would be the gear ratio in the transfur case. low is for pulling HEAVY stuff a VERY SHORT DISTANCE ONLY. 4 high is for road driving in snow and off road 4 wheeling.
The 2006 Chevrolet Tahoe has rear wheel drive.
The 2005 Chevrolet Tahoe has rear wheel drive.
The 2010 Chevrolet Tahoe has rear wheel drive.
The 2001 Chevrolet Tahoe has rear wheel drive.
The 2012 Chevrolet Tahoe has rear wheel drive.
The 2002 Chevrolet Tahoe has rear wheel drive.
The 2014 Chevrolet Tahoe has rear wheel drive.
The 2009 Chevrolet Tahoe has rear wheel drive.
The 2003 Chevrolet Tahoe has rear wheel drive.
The 2013 Chevrolet Tahoe has rear wheel drive.
The 2015 Chevrolet Tahoe has rear wheel drive.
The 2008 Chevrolet Tahoe has rear wheel drive.