Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello, my name is***** for the question. The most common cause of this is water entering the module under the hood. Under the hood on the frame rail on the driver side of the radiator is one of the main vehicle modules. It tends to get wet and this occurs. Check the connection for moisture and corrosion. Then also check the ground connection located under the driver door as that can cause it to act like this. Please let me know if you need more help.
Sorry for the delay in getting back with you. It is the powertrain control module. The transmission control module is also right near it in the radiator shroud.