I'm not sure if its a 4L60E, or a 4L80E.
What type of transmission is in my 1996 GMC Savanna 2500? on 1996 GMC Savana 2500
2500 should have the 4L80 there is a tag on the side that will tell you or call a dealer parts and give them your vin number and they will tell you.
Thanks thats what I thought. The tag unfortunately has been removed.