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I have a 02 trailblazer and need to change the instrument gauge cluster. I found a few on ebay and they state an odometer reading. I thought the odometer reading was stored in the ECM. If I put a new cluster in will it show my current low milage or the new clusters milage.

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I believe the cluster will show the same milage, but your ecm will show "your" correct mileage. a buddy of mine bought one for his silverado that showed less miles, drove for about 2 yrs with it, then changed back and took the car to the dealer and the dealer said "sir, do you know your ecm is showing that you have 59,000 miles, not 22,000???" lol
 
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