Agreed. Sounds like a mode door or blend door actuator. When the ignition switch is switched to the ON position, the HVAC module initializes and attempts to calibrate all of the actuators. This takes approximately 30 seconds. If this matches what is happening, try to isolate the sound. You can see three of them if you drop the glove box. The fourth is up under the driver's side. One of them may be broken, or the actuating arm may be bent or damaged.
2007 GT Premium, Redfire. CAI. Bama Tune. CMDP's. Pype-Bombs. 3.73's. SR 62mm TB. Remote trunk mod. 20% tint.
2010 Xterra Off Road. (The tow rig)
2008 Commander. Hemi. (wife won't let me touch it)