Mando Ruiz

Gasket is in place. Haven't drove through puddles at all Sent from my SM-G955U using Tapatalk

Safe to open and blowout in your opinion? Sent from my SM-G955U using Tapatalk

I'd really like to know where water is coming in from. Dielectric grease will probably help, but I'd like to get to the bottom of it. I doubt I'm the only one having this issue. Sent from my SM-G955U using Tapatalk

So I took it apart on Sunday. Blew it out really good, sprayed it down with electronic cleaner. Cleaned up male and female ends with wire brush. Was running fine since then. Well today I noticed the fan was on again while truck was off. Disconnected again and voila, water again! Where the hell is water entering from?! I looked all over and nothing looks wet. Hasn't rained at all (I live in California) anyone have a clue how water gets in there? Please help! I'm about to burn this truck lol Sent from my SM-G955U using Tapatalk

Resolved in what way? Change out the connector I assume? All the pins were still intact, just a bunch of water and some dielectric grease built up. Cleaned off everything real good, reinstalled the pcm and the truck is running fine with no ses light. I will keep monitoring the fan, but I believe that's what was causing the problems. I read that the bottom pins (those affected) are those of the fan and knock sensors. Is that the case? Sent from my SM-G955U using Tapatalk

So after some more fiddling with the connector I noticed all this buildup. Blew it all out and cleaned everything out real good. Hoping this was the problem. After I did this, the ses light turned off. Fingers crossed. I do have GM knock sensors, gm harness, felpro intake gasket, felpro throttle body gasket on their way. Will have the knock sensors replaced this week [emoji120] Sent from my SM-G955U using Tapatalk

Newbie here, so be nice ? Bought the truck from a private party 3 weeks ago. Seems like the previous owner decided to wash the engine (big mistake) Truck was, and is running fine but getting knock sensor code and fans turn on when vehicle is parked. Searched online and a few people have had this issue. Followed the proper pcm removal and drying method. No corrosion whatsoever, just a bit of water. Plugged back in and cleared codes. 4 days later I jump on the frwy and ses light appears. Get home and check codes. Knock sensor and fan codes appear. I erase them and then out of nowhere fans are on again while truck is parked. Open up the pcm and again, there's water. Anyone else have this issue and found a solution? For now I dried it up and put dielectric grease all the way around the connector to hopefully keep water from seeping in. I even thought about putting the pcm in a plascti bag. Any ideas/suggestions? Like I said before, truck is running perfectly fine.