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According to Service Update N242485780, some Sierra HD and Savana units are fitted with a power steering pump that may prematurely fail. It’s unclear what causes the premature failure.
As a reminder, the 2025 Chevy Silverado HD is equipped with either the 6.6L V8 L8T gasoline engine that generates 401 horsepower and 464 pound-feet of torque, or the turbocharged 6.6L V8 L5P ...
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