Buick/Olds: 2000 LeSabre trunk lid, cell phone frequency, technical explanation

Question
My 2000 LeSabre trunk lid keeps opening on it's own while parked. It happens in different locations in different towns. It has the keyless remote and I have made sure they are were not accidently activated.

Answer
I could give you some highly technical explanation, but simply put, the receiver is probably keyed close enough to a cell phone frequency, or other microwave freq. that it picks it up an reads it as an open command.Try having the codes changed by the dealer.