I use an alarm clock on my smartphone to remind me, then I press the buttons on the fob. RemoteLink takes too long (app talks to onstar through the Internet, onstar calls the car on a phone, sends commands, hangs up.). Make sure you are i\parked outside or have the setting set to not allow ICE while preconditioning and make sure you are plugged in. Yu don't want to build up exhaust in a closed garage.