I am having a problem with my Trailblazer where when I step on the gas after stopping, like at red light or stop sign, the engine will rev up, the tach will increase but the vehicle will start off very slowly eventually gaining speed. It feels like I am holding the emergency brake on, giving it gas then slowly letting off the emergency brake.
It does not do it every time.
I was told that the shift solenoids were bad and I replaced them. It still does the same thing.
Can anyone help

It is a 2005 TB LS 6 cyl 4x4 with 106,000 miles