A little background first I suppose...

It is a duramax/allison combo. Truck has been doing fine, no issues at all. As far as performance, just a k&n cone filter and a magnaflow exhaust. No tuners, chips, or anything like that. Well drove the truck a little while back, no issues, and then parked it. Went to crank it up the other day, batteries were dead. No big deal, through a charger on them, and then jumped it off. Trucks running, warming up, filling the tanks up, etc. Finally get enough air in the tanks to lift it up, and put it in reverse to back up, it just revs. Makes me think twice so I look at the cluster to make sure I didn't go to far and put it in neutral, but its in reverse. Back to park and reverse cause maybe it just didn't engage. Nothing

So I have no reverse, tranny fluid looks good, and don't know if I have drive or not. It is on a slight decline, so if I put it in drive it rolls forward anyways. And I don't want to move it to far to find out I don't have drive and can't get it out of the street. It is throwing a check engine code, but I have no way to pull it to see what it is. Any suggestions? How can I start trouble shooting it?

 

No one?

 

dieselplace.com

This is where I would post this ?.

There website seems real informative like ours but for Dmax's.

 

Guess I am going to have to. I knew there were a few diesel guys on here and gmfullsize and thought I might get some info.

 

I had this happen once to me and it just came up as "shift range Inhibited" on the DIC all i had to do was put it back in park and let off the brake that tried again and it worked

 

need to have the codes checked period......
second if batteries are DEAD. you need new ones,unless you left the lights on or something.
a Diesel needs GOOD BATTERIES!
is this you?
http://www.dieselplace.com/forum/sho...d.php?t=342421

 

Interesting

Yep, trying to figure what batteries I am going to run in it. Thinking about some kinetics. I know I need to read the code, just don't know if I go down the driveway to take it somewhere if Ill be able to get it back up it. Or if it will even go anywhere. And no, thats not my post on there. Had some other financial issues come up, so it may have to sit for a little bit