Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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the fluid is clean and full ?
when these go into neutral like this with the fluid full the issue is usually the forward sprag / oneway clutch failing and causing it to not hold and cause this neutral out condition
i am sorry to say the transmission needs to come out and the forward sprag / oneway clutch needs to eb replaced and it is a very common issues for these transmissions
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ok my mistake the engine just revs up ? and does not neutral out ?
if you disconnect the cruise control cable off the throttle body will it still do this ?
if it stops doing this then the cruise control module is bad causing this problem
there are no codes set at all ?
any access to a scan tool to see live computer data ?
at this point with it being intermittent it s=would not be a vacuum leak as that would cause this problem all the time
the next step would be to replace the IAC valve in the throttle body to correct this problem