How do you change the blower motor in a 1995 GMC Sonoma?

Remove all the connections going to the ECM carefully. Remove the 3 bolts that hold the ECM in, remove the ECM. Take the coolant overflow tank out. There is a stud that held the coolant overflow bottle in at the back, remove this by prying it from inside the wheel well. The fan will come out easy after all this is removed.