On my dads '06 Coly Crew cab, we notice a creaking noise coming from either the suspension or body. It is when the Truck takes off from a stop or upon braking. And mostly at parking lot speeds. We also never heard it in the summer months, only this winter especialy in the morning at colder temps. I thought I heard awhile back that there was a TSB for this refering to the body mounts but I'm not sure. I just want to give him some good info for the dealer in case they can't "re-create".