Servicing the AWD? Is this something a DIYer can do?
CF Monarch
Joined: Oct 2017
Posts: 4,605
Likes: 269
From: USA
Sure you can. You'll need to crawl under the vehicle and pull the fill and drain plugs drain into a container. Then you refill it to the bottom of the fill hole. GM calls for ATF III fluid for the Astro AWD, but you could use Dex 4 or 6 or a "synchomesh" type manual transmission fluid IMO.