MY 96 VETTE CRUISE CONTROL WORKS INTERMITTENTLY. ON A RECENT TRIP TO EFFINGHAM AND THE RETURN TRIP THE CRUISE WOULD SHUT OFF WITHOUT ANY REASON. AFTER A MINUTE OR SO I COULD GET IT TO GO ON AGAIN BUT WOULD GO OFF AGAIN IN 5 TO 10 MINUTES.

There are several things that can cause this issue....vacuum leaks, loose connectors, intermittent speedo signals to the cruise module, brake switch,  etc. I would suggest you have the vehicle scanned for any codes that could point you in a particular direction first. That would at least get you an idea of where to start with the diagnosis/fix.
If you can scan it, or get it scanned, you can post any codes it has here, and we'll help with the diagnosis.
I'm not aware of any particular issues with the CC system, but there may be others here that have had similar problems...

[QUOTE=Adams' Apple]There are several things that can cause this issue....vacuum leaks, loose connectors, intermittent speedo signals to the cruise module, brake switch,  etc.
[/QUOTE]

I agree with the above...specifically loose electrical connections.

I have seen old wires with broken wiring inside the sheathing (plastic insulation).
A scan might show the problem, but it is more than likely going to be a multi-meter and somebody jiggling he wires to make the problem surface...and possibly a vacuum leak with the hoses being jiggled around can make it surface.

Usually the hardest problem(s) to diagnose is an intermittent problem.


GL




Jim

My 81 does the same think.  I can set the speed for 55 say, and then it will, out of the blue, zoom up to 70 or beyond.  I have not even started to look for the exact problem yet but I bet it is going to be vac or electrical related.  Probable a leak in the vacuum system somewhere.

Check the vacuum.  There is a valve under the port (as you look at the engine) injector cover that has 1 line going in and two coming out.  1 out goes to the cruise control.  This item is about 10.00 at the dealership