Every now and then I am a clever boy. The old fobs for my 2005 Grand Prix wore out and so I bought two new fob case/pad combos off of eBay. $5 each. Take the circuit board out of the worn fob case and put it in the new one. Wah-la.
Works like new! Pretty clever so far.
But I want to do one better. When I bought the car I had an aftermarket remote start added (by the dealer as an enticement to buy). It came with its own fob. (Meaning I carry two fobs around--not so clever.) The original factory fob circuit board has a switch on the board for a remote start, but since there was no factory-installed remote start, it was put in a case that did not have a button. (Looks like GM makes one circuit board for both types; if the car doesn't have a factory remote start, simply don't expose the button).
When I saw the fob circuit board has the switch for the remote start, I decided to buy the case that has the remote start button. But of course while the rest of the buttons work, the remote start button does not. It'* not programmed.
I want to program the remote start button on my factory fob (which my new case can click) to activate my aftermarket remote start. Can this be done? "One fob to rule them all." If so, that would be very clever.