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Q: Squeeky belt on 2005 GMC Sierra 1500

I have replaced the surpantine belt and AC belt in Oct and both belt tensioners after the belt didnt work. After i replaced the tensioners the squeek was gone for a month but now this weekend in the morning there is a squeeky belt sound again?
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I didn't us GM belt tensioners but bought the best Orielly's had brand was Gates. Maybe its the belt alignment or could the idler pulley or alternator pulley be causing the squeak? Would anyone recommend a belt dressing I heard they it cause more issues.
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