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Pontiac Bonneville Problems

Transmission Fluid Leak From Cooler Line on Pontiac Bonneville

Problem Description and Possible Solution

The rubber section of an automatic transmission cooler line may develop a fluid leak . In some cases the leaking section of hose can be replaced. In others, the complete cooler line must be replaced to correct this concern.

(21 people reported this problem)

Pontiac Bonneville Vehicles With This Problem

RepairPal Verified
Average mileage: 147,456 (75,000–200,815)
15 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005
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Brake problem? Or maybe a faulty head gasket cylinder?
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