no
It isn't feasible to convert from two wheel drive to four wheel drive.
The 1990 Cadillac Sedan DeVille is front wheel drive. The 1990 Cadillac Sedan DeVille is front wheel drive. The 1990 Cadillac Sedan DeVille is front wheel drive.
The 2012 Cadillac Escalade has rear wheel drive.
The 2011 Cadillac Escalade has rear wheel drive.
The 2009 Cadillac CTS has rear wheel drive.
The 2003 Cadillac Escalade has rear wheel drive.
The 2014 Cadillac Escalade has rear wheel drive.
The 2008 Cadillac Escalade has rear wheel drive.
The 2009 Cadillac Escalade has rear wheel drive.
The 2014 Cadillac ELR has front wheel drive.
The 2015 Cadillac Escalade has rear wheel drive.
The 2013 Cadillac Escalade has rear wheel drive.