While slowing down the transmission downshifts at 24 MPH. This is a hard downshift that jerks my head into the headrest. I just bought my wife a 2011 Cruze 6 speed auto trans, it does the same thing. I took the Equinox to the dealer I purchased it from, they did some up dates to the TCM and the ECM and then said the usual...cannot reproduce the problem. I spoke to a service rep from another local dealer, he said "all of the Chevy 6 speeds do that. There is nothing chevy is going to do about it.