Grand Prix

Serpentine Belt Tensioner Pulley May Wear Out on Pontiac Grand Prix

Problem Description and Possible Solution

The serpentine belt tensioner pulley may wear out. Our technicians tell us that in order to get a new pulley from General Motors you must purchase a complete belt tensioner assembly.


Problem Data
RepairPal Verified
Average mileage: 153,911 (75,310–278,000)
Engines affected: 3.1L V6, 3.8L V6, 3.8L V6 Supercharged
10 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2004, 2006, 2007
42 people reported this problem
Viewing 1 - 12 of 12 comments
i already had fixed around 55000 because the belt kept sliding off if it got even slightly wet.
Noticed the problem when checking over customer's vehicle while readying it for a long trip. Will be replacing when they return.
One of the pullys just squeal really loud and I was told I need to get that replaced because the baring is going out.
The tensioner pulley wheel bearings seized and the entire tensioner assembly had to be replaced because of the damage done by the pulley wheel itself to the tensioner assembly.
Have had 2 tensioner pullies fail. Both times I ruined my belt. It cheaper to change pulley than replace both. I keep old pulley and belt just incase.
Pulley has squealed for couple weeks. Drove fine until it sat overnight and when we went to leave there was no power steering. Checked belt to notice it was slipped off bottom pulley.