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My Spark still behaves erratic at times and I have never been able to find a surefire way to replicate the issue. Even if the TCM, ECM, and PCM says it's the current version, would a reset help? Do dealerships perform software reprogramming or resetting on request?

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Certainly worth looking into Rob..Try to come up with a specific list for them. If that approach fails find or go to your trusted mechanic and spill the details trying to be as accurate as you can..Not sure if a reset is necessary and not all issues are electronic, however the ECM does control quite a few functions. Always remember to bring notes as detailed as possible since intermittent issues are always difficult to pinpoint without some details as a starting point to use a process of elimination to find the problem. Most independent mechanics will not touch the Spark CVT's., so CVT issue..dealer.

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