Ok, it looks similar to my Viper, but by a different manufacturer. The automatic part of the defroster, may be a programmable option that isn't turned on as a default because the defroster may not always be on. Try turning it on from the remote and see if that works. If so, then it'* simply a matter of having the shop reprogram it to default as on.
Your heated seats may be hooked up as an output on the remote, but in the 00+ Bonnevilles, the heated seats require a push of the button to turn on.