I have a 2010 Buick Enclave and while driving down the road the power locks will unlock and lock and then the car goes into neutral, RPM'* go up, car slows down and engine rev'*. This lasts 15 - 30 seconds then the car goes back into drive. It has happened at 25 mph all the way to 70 mph. It'* very scary and dangerous. I have had it to the dealer multiple times, has not done it for them so they just tell me they don't know whats wrong. I know from reading some other forums this has happened to others and am trying to find out if they had the issue fixed and if so what was the problem. I have had the harness tightened, wiring checked, replaced the BCM. I am afraid to drive the car and am at my wits end. When I call GM they say, take it to the dealer, they have not hepled me at all. The other issue I am having is the car will jerk while driving, will not shift gears, Service stabilitrac, park assist off and traction control off will flash on the dash and the check engine light comes on. I have to stop the car, turn it off and start it back up in order for it to stop. HELP

Hard to believe a code was not set, even in history....

Has not thrown any codes

What are you using to check for codes? Pocket code scanners will not see B or U codes. A body control module or trans computer could be having issues communicating on the CAN network and your cheap pocket scanner won't see it reporting it.

Scanned by the dealer and my mechanic, had BCM replaced hoping that was the problem

Sorry to bump up an old thread but this is almost exactly the same problem I have with a 2017 Encore. The main difference is the car goes back into drive within a second or two.

Does anyone have any ideas? These are the error codes that showed up initially but haven't come back after clearing: P0011, P0601, P0700

Those are ominous codes indicating problems within the PCM and also possibly the TCM.

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Thread closed.

Your 2017 Encore has almost nothing in common with a 2010 Enclave. Another good reason to start a thread from scratch to diagnose your issue.