My son's coming home for a few weeks and I need to get his 2000 K3500 single rear wheel truck ready for him to drive. 350 gasser. Last Christmas we replaced a rusted through rear brake line and I've never bled it yet. I'm sure air has migrated up into the ABS module up under the master cyl. All info on this model that I can find indicates that I'll have to have a scan tool to do the ABS module autobleed. I've got a good OTC Genisys scanner that I bought years ago, but the software update kit is ~$790 and that dog won't hunt. The GM Tech II is pretty is expensive, even used. I don't have the wiring diagrams yet, but can I not command the ABS pump on and operate the valves from the ABS module connector? Or does it have to be done as per some autobleed sequence? Any advice will be appreciated. Thanks.