How do I use Remote Vehicle Start on the 2012 Cadillac SRX?

Press and release the Lock (Q) button on the RKE transmitter, then within two seconds press and hold the Remote Start (/) button until the turn signal lamps flash. The engine will run for 10 minutes, during which the doors will be locked and the parking lamps will remain on. You can extend the run time once for an additional 10 minutes by repeating the same steps while the engine is still running. (Page 11, Page 42-43)