2007

After a drive-through car wash or rain storm I notice that my floor board in front passenger side is soaked or pooled with water. WTH? How and why does this happen? I can't imagine it was sold this way at the factory. I'm guessing it's leaking somewhere from the front hood vent from the outside. Any ideas on why and how to fix?

 

Do you have a sunroof? If so, clean the drains and do the fix.

Or, you may have broken riv-nuts holding the roof rack rails to the top of the cab.

 

check your bcm as it is notorious for getting water damage. maybe you can still save it. don't wait till you have issues.

 

Thanks for the direction. I ended up finding the drain hose on front passenger side disconnected from the grommet. I cleaned grommet and reinstalled. Hopefully it fixes the issue.

 

BCM? Computer Module? Is that under right side dash?

 

Don't JUST clean the grommet....do this! https://www.hummerforums.com/forum/h...n-tubes-28548/

 

behind the kick panel https://s3.amazonaws.com/rparts-site...ad890a12bd.JPG

 

I didn't read anything new or revolutionary in this thread other than people drilling the X rubber out. I reamed mine out with a large screw and prefer to keep the X rubber in there.

I also blew air up through the drain tube to verify it was clear. Is there a way to check the tubing from the engine side of the firewall to verify the tube is clear all the way down?

 

And, there in lies your mistake.....we'll see you back on the forum in the future complaining about water on your carpeting. You've been warned!

 

NEVER ever use compressed air to blow out the drain tubes. When you spend some time reading here you will see that virtually everyone who did caused the drain lines to become disconnected above the headliner and created a much bigger problem to deal with.

Cut out the X, it is what causes the backup to begin with.

The other mod for all H3/H3Ts, get rid of the OEM Battery Terminal Connectors. Nothing but garbage. Swap them out for a quality aftermarket set like Stingers or your favorite brand.