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Originally Posted by troy1
could be your CAT failing. GM extended the warranty because of problems. If the cat plugs you have to use more "power" to try and over come the backed up exhaust gases which inturn make the transmission shift later. Do you have any stored DTC's not all of them will turn the SES light on.
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Taking the Car in to have CAT looked at.. After seeing your post I have been reading up on what other problems people have been having.. everything seems to make since. I would have thought for sure with the CAT messing up, it would have caused me to fail the Emmisions test 2 weeks ago, but I have been told since then that is not always the case.
I noticed this when trying to take off fast, and thought it was the Tranny. But I have been complaining about the loss of power for about 8 months.