Squeaking won’t go away

Squeaking won’t go away

Hello amazing people of reddit! i have a 97 chevy c1500 and its been squeaking recently. i’ve replaced the serpentine belt and it helped for about a week then it started right back up. i’ve replaced the idler pulley and tensioner pulley to no avail. i’ve sprayed wd40 behind all my pulleys and nothing. the only thing that seems to work is when i spray on the smooth side of the belt. it’ll stop squeaking for a few seconds then come right back. any ideas? thank you in advance!!