Water at blue pcm harness 06 sierra 5.3 139k miles

[Supreme Pizza]

As for where the water is coming from, your computer may be full of water. As it sits, the water leaks out into the plug. The water could have entered the computer be running down the wire bundles and through the connections. Or perhaps someone pressure washed that area, forcing the water in. 

[Mando Ruiz]

As for where the water is coming from, your computer may be full of water. As it sits, the water leaks out into the plug. The water could have entered the computer be running down the wire bundles and through the connections. Or perhaps someone pressure washed that area, forcing the water in. 

Safe to open and blowout in your opinion?

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[Supreme Pizza]

In my opinion, you can safely open the computer box, but do it carefully. If its 100% dry inside, seal it back up right away. 

 

If its wet: 

 

Consider buying "VIN # Programmed" unit on eBay for $100 delivered. 

 

If you want to dry yours out, use gentle compressed air, and then set it on top of your refrigerator for a day or two. In front of a fan for a day or two works as well. 

 

Static electricity can fry it, so you don't want to do it on carpet while wearing socks. Also, when your holding the computer, try to avoid being hit by lightening - as it can damage the computer. 

 

 

 

[txab]

Is the rubber gasket in place and intact at the PCM connector? You never drive through a puddle of water anywhere at all?

[Mando Ruiz]

Is the rubber gasket in place and intact at the PCM connector? You never drive through a puddle of water anywhere at all?

Gasket is in place. Haven't drove through puddles at all

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[txab]

 

 

Guess you could always heat the ECM and drive the moisture out of it. Wonder if the PO had opened the case and ruined the seal. Or do as suggested and purchase a replacement

[Supreme Pizza]

If you open the computer, dry it out, seal the connections with dialectic grease, and then hit the whole area with expanding foam, you will never have a water issue again. 

 

 

 

[Malone]

Mando, did you ever find out what why/how water was getting into the pcm connector?