GMC Sonoma Problem Report

GMC Sonoma Serpentine Belt Tensioner May Fail

(15 reports)

The serpentine belt tensioner can fail; it may become noisy and/or the belt may jump off. Replacement of the failed tensioner will be necessary.

Belt tension pulley shattered no warning at all drive the truck every day..bought a new one and they are plastic..lol this could befixed. With a better part... -
Mine squeaks but only during summer when I use the AC. Water from some where is getting on the tensioner which then starts squaking. I change the AC setting for less cool air and the squeak eventually goes away. -
Belt tensioner is about to fail. Chatter on the belt caused the bearings in the Alternator to fail. There is one more pully that is making noise when the truck is in gear, moving I can hear that there is vibration. Other people outside the vehicle hear it too. The transmission contacts had build up on them, the vehicle now has 160K and will be needing a new tranny. I am the original owner, it has been a good truck. -
Belt tensinerwore out anf fell off! -
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