I own a 08 Frontier V6, SE and have had some issues when it starts in the morning. It keeps making this sort of buzzing/skreeching noise until it warms up. The sound is intermittent and not constant. I took it to my dealership last January and they replaced my tensioner and belt, yet it did not fix the sound. I only hear it when its been sitting outside overnight in the winter and colder months, nothing in the summer. Talking to a nissan mechanic, not the one who worked on my truck, he said it may be the alternator pulling lots of power in the morning when its cold, but it persists for about 15-20 minutes until it is warm. Could this be the issue?
Here is a recording of the sound. Let me know if anyone has hear/dealt with this problem, if it is in fact a problem