Serpentine Belt Tensioner Pulley May Wear Out on Chevrolet Monte Carlo

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.


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Average mileage: 123,121 (78,000–198,000)
Engines affected: 3.4L V6, 3.8L V6
8 model years affected: 1998, 1999, 2000, 2001, more2002, 2003, 2004, 2005
24 people reported this problem
11 people shared problem details
2003 Chevrolet Monte Carlo- 3.8L V6130,000
Serpentine Belt Tensioner Pulley froze up and the belt Serpentine Belt broke, had to replace the whole assembly.
1998 Chevrolet Monte Carlo- 3.8L V6120,000
Serpentine belt tensioner pully failed. Was able to nurse care to nearby Autozone which had the pulley. replaced belt also. Approximately $40 in parts.
2003 Chevrolet Monte Carlo- 3.8L V6140,000
tensioner pulley seized up. Repaced pully and belt
3.4 I replaced tensioner
2003 Chevrolet Monte Carlo- 3.8L V6125,634
The tension pully locked up and broke the serpentine belt, i called my local autopart store and they had both the pulley by its self for $20.00 or a complete unit for $104.00, i chose the pully by its self. due to that the tensionor was good, and i had now coolant leaks, it took me all of 20 minutes to replace the pully and the new belt, was not hard to do, after all is done the car is back on the road.
2005 Chevrolet Monte Carlo- 3.8L V6105,300
Cost me $100 for the whole pulley & tensioner . Luckily I had a friend fix for cheap labor! More work than I thought. But works great!
2003 Chevrolet Monte Carlo- 3.4L V6198,000
tensioner broke and had to replace it and belt
2003 Chevrolet Monte Carlo- 3.8L V6131,000
Snapped two serpentine belts same day. Tensioner Pulley was hard to turn.
2004 Chevrolet Monte Carlo- 3.4L V6120,000
Belt Tensioner out twice in year span.
2003 Chevrolet Monte Carlo- 3.8L V699,060
Engine overheated one day. Next day, added coolant directly into radiator, it immediately flowed out near the water pump. Towed to dealer, diagnosis was "cross over parts - tensioner inlet pipe". $511. parts & labor.
1998 Chevrolet Monte Carlo- 3.8L V6130,000
This is the 3rd time the tensioner is being replaced! I'm averaging 1x per year!
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