Factory Remote Start question

The factory remote start option has a 10 minute timer on my 07 GMC Yukon SLT -- does anyone know if there is any way at all possible to extend this time to, say, 60 or 90 minutes? I installed a system in my Dodge Ram to turn on the ignition at a certain temperature for the dogs, but I've come to realize that in Florida the interior of a vehicle is very rarely below 79 degrees, so the truck basically runs all the time -- I figured if I can just extend the factory remote starter to run for a much longer period of time then i won't have to worry about installing any aftermarket remote starter units.