Car Problem Reports

GMC Sonoma Serpentine Belt Tensioner May Fail

GMC Sonoma Problem
15 Reports
Me Too

Model Years Affected: 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003

Engines Affected: 2.2L 4 Cylinder, 4.3L V6

Average Mileage: 120,750 mi (55,000 mi - 168,000 mi)


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.

  • Visitor, , 2.2L 4 Cylinder, 168,000 mi

    Belt tension pulley shattered no warning at all drive the truck every day..bought a new one and they are this could befixed. With a better part...

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  •  Enthusiast

    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.

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  • Visitor, , 4.3L V6, 150,000 mi

    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.

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  • Visitor, , 4.3L V6, 55,000 mi

    Belt tensinerwore out anf fell off!

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