Four wheel drive will not disengage on a 1999 Chevrolet Suburban if the actuator has been damaged or the circuit has a short in it. Checking the fuse and connectors can be a quick repair.
The 2008 Chevrolet Suburban has rear wheel drive.
The 2012 Chevrolet Suburban has rear wheel drive.
The 2011 Chevrolet Suburban has rear wheel drive.
The 2006 Chevrolet Suburban has rear wheel drive.
The 2009 Chevrolet Suburban has rear wheel drive.
The 2010 Chevrolet Suburban has rear wheel drive.
The 2014 Chevrolet Suburban has rear wheel drive.
The 2001 Chevrolet Suburban has rear wheel drive.
The 2004 Chevrolet Suburban has rear wheel drive.
The 2002 Chevrolet Suburban has rear wheel drive.
The 2005 Chevrolet Suburban has rear wheel drive.
The 2015 Chevrolet Suburban has rear wheel drive.