Originally Posted by tpbrady
Garmin can use any pump as long as it has the capacity to move the ram. You do lose some features.
This is something I didn't realize when I was AP shopping. I read that the (newer generation) Garmin AP needed to use the proprietary Garmin (smart?) pump, so I decided to go another way. But I later learned here, from HopCar I think, that you actually can use other pumps, but as you say they just don't do everything. I guess for me that still kinda feels like it "needs" their proprietary pump, but still, I didn't even realize there was any other option than their pump at the time.