Had a loud vibration/ noise in the blower motor for the heating system. Was so bad I couldn't put it past the first fan speed setting with out the dash vibrating. The lower setting caused a slight vibration and a ticking sound.

I pulled the passenger kick panel off under the dash and pulled out the blower motor (3 screws holding it on)

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This little guy threw off the balance of the blower motor causing the vibration. The tail sticking out fins caused the ticking sound.

Morale of the story: don't let your kids eat in the vehicle while you are away.