Oil Pump Drive O-ring May Leak Oil From Rear of Engine on Pontiac Montana

An engine oil leak may develop from the rear of the engine. This is commonly caused by a failed oil pump drive o-ring seal. The leaking o-ring should be replaced to correct this concern.

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Average mileage: (–)
Engine affected: 3.4L V6
7 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005
8 people reported this problem
0 people shared problem details
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