on my 03 escalade i have a keyless entry remote (like most other cars in this genre). How ever when i got my car at 83,000 in 2007 the remote unlock didn't work at a far range. Sometimes it does work to a reasonable distance and other times i have to be right next to my car. So does the power of the wireless remote diminish over time? i tried changing out the battery and that had no effect. Do i need to get a new remote or is it a problem with the receiver on the car?