When this happens, have you ever had the computer scanned for diagnostic trouble codes? Often times an electrical issue will show up. As far as scanning, here is a quick video showing how it is done:
I realize most people don't own a scanner, but often times a parts store will do it free of charge.
The next area I would consider checking for water issues would be the totally integrated power module (TIPM). These vehicle are known to have issues with the multiple connectors at the TIPM. The TIPM is located under the hood on the left side of the engine compartment. I attached a pic of it. I would check to make sure all connections are tight preventing water infiltration.
Check these things and let me know what you find or if you have other questions.
Friday, April 17th, 2020 AT 5:16 PM