Squeaking noise

i have an 2010 tundra base model I have this horrible squeaking noise when I start my vehicle but then goes away after 5-7 seconds, but it doesn't come on if I let the battery cycle all the way then start it, what could it be? After it sqeals it goes away for good. TIA

 

Alternator belt is the usual suspect. Next up are the idler pulleys, though those tend to get loud and STAY loud. Good luck!! This should be an easy fix either way

Edit: quick check on the alternator belt is to losses the alternator mounts slightly and use the adjusting nut/bolt the tighten the belt just a smidge and see if the noise goes away. Do not over stretch the belt (trust me). If the noise is gone after that, it's time for a new belt. $30-40 in parts and a 1-2 beer job