Twice I have shut the truck off and restarted within about 10 minutes and cruise control was not operational(no dash board light, doesn't engage). Pulled over and turned truck on and off a couple times and it starts working again???

This has happened twice in the last month. Have possibly turned ignition before the glow plug light went out(its a diesel). That is all I can think of that I did different. Anyone had this happen?

ps put it on my laptop code reader and it shows no thrown codes

This seems to be an intermittent problem with GM Duramax's. Pushing the brake and releasing it seems to work for some. Give it a try.

Yeah my cruise has pulled this little stunt three times on my truck. Stopping and restarting brought the cruise back to life. According to a friend of mine who works for the local chevy dealer this occurs through out the chevy line.

I have had several problems in the past, "Check brakes", "Check 4x4", Cruise control, etc.

If I turn the key on and let the dash "Bulb check" finish, even with the "Glow Plug" logo still on, I have no problems. I also turn off the DSL's (sorry Canada), reduces battery draw.

All of the computers have a "Hand Shakeing" routine they go through when first powered up and if the engine starts before they finish the routine, they abort/branch in mid stride and send out bogus faults. Just my .02. :)