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Sounds like it or your math is off one
The engine hours have reset several times on my Yukon. I have a theoretical time of 6,549 hours after 204,280 miles. Her average speed with me for the last eight years has been 31.2 mph. My fuel used has rolled over after 10,000 gallons. It's now almost 14,000 gallons since new.
Not in this lifetime.
It can. When I've properly changed a battery the information stayed in memory. When the cars were jumped and they often had their counters reset. My Yukon just reset again when my wife tried to jump it. It did not reset when I changed the battery a few days later.
