I got an AC Delco fob off Amazon and the GM dealer I went to was able to program it and the crappy aftermarket one I got for around $32. The aftermarket one I have came with a programmer box that plugs into the OBD II port. Avoid this. You will lose your ability to sync your TPMS sensors. Thankfully, with the AC Delco fob, I can sync my TPMS sensors again. Still can't sync with the aftermarket fob, but it still locks and unlocks everything. Certainly stick with OEM, like AC Delco. The AC Delco on Amazon is around half the cost the dealer wants too.
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