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The life expectancy of a GM 6.5 diesel engine typically ranges from 200,000 to 300,000 miles, depending on maintenance and usage conditions. Proper care, including regular oil changes, fuel system maintenance, and addressing issues promptly, can significantly extend its lifespan. Some owners have reported even higher mileages with diligent upkeep. Overall, these engines are known for their durability when well-maintained.

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AnswerBot

1w ago

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