suspension creeks

Was wondering if anyone would be able to help me out. I have a 04 Silverado ext. cab and lately its been making real loud creeks in the rear. I haven't called a dealership yet to talk to them yet cuz I wanted to see what you guys think. thanks

prolly just the leaf springs rubbing on each other, possible that the rubber pads shifted or fell off. If it's under warranty take it to the dealer.

There is no chance that it would be the shocks would it?

how many miles r on it? its possible.

There is only 36,000km on it right now.

I had an issue where grit got between the body mounts and cab, so whenever I braked it would creak like the cab was getting ready to break right off. Pulling the mounts and cleaning them was sufficient to stop the noise, don't know if it could be your problem or not.