I have a 07 Escalade that I purchased 5/06, I have had nothing but issues with the transmission. I first reported that there was a hesitation upon starting from a dead stop, “lag” at 40, rough shifting. All I hear is that the module controls the trans, they “tuned” module, took back, “tuned” module, took out the driveshaft and all of the other stuff but….this has gone on since I had truck. One time the transmission man said he had no idea what computer program was in the module, I tried to calmly explain that his dealership has done all of the work since I bought the truck from them. :banghead: I get tired of bringing it in so I was just living with it until the other day when upon rapid acceleration the truck nosedived between shifts, this happened twice, and then developed a whining noise that gets louder until trans shifts and then starts again. Off to the dealership, service manger drove and heard noise, left vehicle, now there is no noise that they can find. The truck sits in the lot and they have no idea how to proceed…….thoughts?