How do you remove the transmission from a GMC truck?

Answer by  Grag (452)

You need to lift up the vehicle up then make sure that you disconnect the wires that are connected to the transmission. Then you must remove the driveshaft. Then unbolt the transmission from the engine. Make sure to have a jack under the transmission and then pull the transmission slightly backwards to clear the enginge and then lower it.

Answer by  Joe1010us (239)

Start by removing drive shaft. The starter needs removed as well. Then remove all cables and wires connected to the transmission. Remove the cross support holding up the trans, while placing a jack under it to make up for support. The bell housing bolts are next then its ready.