I had to park my GTO outside this morning so I hit the trunk button on my transmitter, because I needed to dump 2 bags of trash, then I hit the 'lock' button after I closed the door. A few minutes later I went back out to the car and lifted the trunk lid...my horn started sounding, like I had some kind of Blackdog car alarm system installed or something:willy: ...I bought my GTO brand new off of the showroom floor. Everybody's GTO does this? My key/transmitter has a Pontiac logo and a GM P/N on the backside.