Engine Dies In Anything But Park 4l80E

[kmdracer]

Again, this sounds like a column issue. I haven't been into a column on a newer GM truck yet, nor do I have a wiring schematic for it. It sounds as if you are loosing the ignition signal from your key switch. I'm more familiar at the moment with the newer Dodge columns. They have what Dodge calls a "Multi-switch" that everything in the column goes through (as well as a few things you wouldn't think should be there) I had a problem where sometimes the Air Con Blower would juts shut off. Took me a month or two to figure it out It was the multi switch in the column.

Don't know if you have schematics for your truck or not, but if you don't Autozone has quite a few. Gave it a quick look, and they do have your truck listed. To get to the wiring diagrams, you will have to register, input vehicle data, click on "repair info" then click on "vehicle repair guides" then "wiring diagrams"




After re reading your original post, I see your struck is not stock. How long ago did this problem start happening? What was the last thing done to/with the truck before the problem started?