2001 4 cylinder. On cruise at 70MPH, engine abruptly stops. No engine
warning lights on, radio, blinkers still work. Of course no power brakes,
steering, etc. Turn ignition completely off and try to restart. Starts
immediately. Another 100 miles pass and same thing happens. Local GMC
says he never heard of problem. Truck currently runs fine but this is a
real safety hazard. When it first happened I was nearly overrun by other
vehicles and could barely steer and stop the vehicle on the shoulder.
Anyone have this happen or have a clue about what is going on I would
I had a similar problem in an older Buick, which turned out to be transistor
issues in the ECM computer. It would also restart immediately, and although
the dealership (was under warranty) couldn't find the problem, there was
a TSB out on this particular issue (89 Regal). In those days, Buick had
zone representatives, one of whom immediately recognized the problem.
Have also heard of marginal connections in the plugs to the computer, and
other places in the system. Last, in one case, I had an ignition switch
caused similar problems.
There could be several other causes as well, and they may be hard to find
since this is an intermittent problem.
Thanks for your prompt response. I will check the wires to the computer
and also take a look at the ignition switch. Also plan to call other GMC
dealers in the area to see if they have a TSB on this problem. When/if I
find out the problem I will post again. In the meantime, any other
suggestions will be helpful. Thanks!
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