Squeaking Noise
 

Help, the noise is driving me crazy. I have an 08extended cab silverado 1500. When the road gets bumpy, there is a squeaking noise coming from where the driver side door and the passenger side crew cab door join. It only makes a squeak when there are bumps. On a related note, does anyone know how to stop the truck from vibrating when there are ripples in the road. It almost seems like the truck is oscillating. I heard putting some weight over the rear axle. Any help on these 2 questions is appreciated.