Started the truck up after work yesterday, problem gone. Has not recurred today.

My GM buddy and I think it may in fact be the module under the dash. As you said Smitty, that problem was prevalent with the older S-10s, but the symptoms are exact. Intermittent problem due to bad contacts. Have not put it on the scanner yet to see the codes. The motor would probably just go bad and not recover in my opinion, so I don't think that's the credible component.

In any event, I may just play dumb since it cleared itself. If it happens again, I'll start attacking it.

Thanks for your inputs guys, especially you Smitty. You obviously know your chit.:cool:

If the problem comes back and you narrow it down to the module under the dash get the part# off it and pm me,like I said,I own a brand new one that might be what you need. After serious trouble shooting with my snapon scanner and a voltmeter we narrowed a similar problem down on a 02 or 03 autotrac 2500 non-hd truck (should be same),bought the control module,and it made zero difference. Ended up being the encoder motor like every other fullsize we have ever fixed so I'm stuck with a 400$ t-case control module (couldn't exactly charge the customer for it AND a 400$ plus encoder motor),Smitty

Yup,

mine went bad on the way to Key West a few Years back, going over the 7 mile bridge doing 60, I looked down, and it was in 4WD:eek: not really, but that was what the indicator said

Thanks man, maybe we'll need to make a deal.
Dave