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Cadillac STS Problems

Contamination of extended life coolant on Cadillac STS

Problem Description and Possible Solution

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
(6 people reported this problem)

Cadillac STS Vehicles With This Problem

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Average mileage: (–)
6 model years affected: 2005, 2006, 2007, 2008, more2009, 2010
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