Either run it out until so little is left tank is light or you can siphon it. They sell cheap siphon pumps at many auto parts stores. You squeeze a bulb to get it flowing & then just wait.
The fuel pump in the older eldos is located inside the gas tank. once you drop the tank its pretty straightforward from there.
The gas tank on the 2007 Cadillac SRX holds 20 gal.
The gas tank on the 2006 Cadillac SRX holds 20 gal..
The gas tank on the 2010 Cadillac SRX holds 21 gal..
The gas tank on the 2014 Cadillac ATS holds 16.0 gal..
The gas tank on the 2008 Cadillac CTS holds 18.0 gal..
The gas tank on the 2005 Cadillac SRX holds 20 gal..
The gas tank on the 2004 Cadillac Escalade holds 26 gal..
The gas tank on the 2014 Cadillac XTS holds 19.0 gal..
The gas tank on the 2005 Cadillac CTS holds 17 gal..
The gas tank on the 2014 Cadillac CTS holds 19.0 gal..
The gas tank on the 2011 Cadillac Escalade holds 26.0 gal..