[GMFreak8]

When ever I start the Suburban up and it is cold outside 25 or below, the speakers will make a crackling and popping sound for about 30 seconds and than stop. It doesn't seem to hurt anything but it doesn't seem normal. What could cause this, the radio doesn't have to be on for the crackling and popping to happen. Each speaker will pop and crackle individually, its not all the speakers at once. It seems to start in the front drivers side door, than it will start in the front passenger side, and than go to the rear passenger side, rear drivers side, and than the back speakers on the back pillar will start to crackle, and they will all do it for about 10 seconds, than it fizzle out. Its really wierd. I thought I was getting shot at the first time it happened it was pretty loud. Anyway is anyone else having this issue.