Greetings, My daughter has a 2006 equinox that has about 40,000 miles, few if any problems with the vehicle up to now. Beginning recently, especially when the car is cold, driving up a hill results in the tachometer reaching 3,000 or 4,000 rpm's and the car slowing to about 10 mph. Increasing the engine speed does not increase the speed of the vehicle, it is almost as if the transmission is "slipping". Shifting into L2 helps a little. She says the problem is not always present. The Chevy dealer indicated they have not run across this problem before. Has anyone else had this problem?