Depending on what GM key you have it may need to be cut by a locksmith or dealer. If you have a "Fobik" remote, they usually have an emergency key to get into your car that can be cut, same goes for push to start.
It should show cut-in pressure just below the typical 30 psi mark. That way, when a user opens a valve and the pressure in the system and tank drops below...
A key fob is basically just a remote to lock and unlock your car. They are commonly used for keyless entry into a vehicle for ease of access. To program...
