squealing noise when my car goes around 20-40 mph.

so i have a 2004 tacoma and it has ran perfect ever since ive had it. yesterday i was driving home at night and it started making a squealing noise when i was between 20-40 mph. i checked my transmission oil and it was fine, so i dont know what it would be. can somebody please help?

 

Can you pinpoint what direction or place its coming from ? i.e. passenger side, driver side, front or rear

 

it sounds like its coming from the front under the hood.

 

Could be your tension pulley or a belt. Or even cam and lifters. My 2010 silverado made the same noises and it ended up being the cam so i scrapped it and got a yota

 

well it didnt start making this noise until i took it to goodyear to get the oil changed, while it was there they called me and asked me if i wanted to get the transmission fluid changed but it didnt need it so i said no. and they said it was turning dark so it needs to be changed but i said no. and the day after i got it back it started making this noise. so im kind of suspicious about them

 

I wonder if they spilled some oil on the belts, when adding the oil.
Look for signs of spillage.

 

Smart money would be this..

Monster, I thought it was bad when my Colorado puked a head, cam, and chain at 78k..yikes.