Sunroof drain

Its suppose to drain out of the bottom of the body of the car. Did the hose come off the duckbill that fits into the bottom of the car?Is water draining from the top down or only at the bottom side of the hose?

If the hose isn't attached to anything that explain all the water in your rock panel area. There should be a duck bill valve fitted into the body with a sleeve sticking up and the hose fits into it.

That's strange all the gm drain hoses I have seen all connect to a duct bill valve that pass threw the body of the car or you would flood out the inside.I have been trying to find a diagram and haven't been able too yet. I am still trying though. The manual doesn't mention any fitting )duckbill) it just states to be sure the drain hose is outside the rocker panel support to prevent drainage into the vehicle

See the diagram below

One of the best ways to check the drain flow of the sunroof, is with it fully open, pour water from a bottle into the front corners. If the front tubes are flowing, you should see the water drain from the corresponding sides, probably just to the rear of the front tires. If the water pools in the sunroof tray, it is not draining out the front. You can have success clearing them with compressed air, but you can also blow them off of the frame, and they would need reattached or the water leak will continue. To check the rear drains, use the same procedure, but the front has to be higher in profile, to encourage the water to run to the rear. Be careful as you do this, the drains are only going to flow so fast, and with too much water introduced you can overwhelm it's capability.

There is a motor in the sunroof that may be bad. You need to remove the headliner and verify voltage.

Roy

Under the dash. Very labor intensive job. Ac has to be broken down along with the cooling system. It is about an 8 hour job plus the ac evac and charge.

Roy

Sometimes we need as much info as we can before being able to give you the correct answer. Thanks for your patience

Roy

You have cleared it 2 times and has not done the job. Removing the drain will allow little acess to all the debris. Keep trying if you want but I think you still may have to remove the case

Roy

He is saying to take apart the ac box I have a better suggestion though. They sell a foaming ac evap cleaner you spray half the can in the ac vent wait ten mins then spray the other half of the can in the ac drain.

Make sure the hose on the can has a tapered tip.

Hey guys,

Pull the carpet back on the passengers side, there is a tube that transfers the water from the evaporator to the firewall that falls off and lets the water drain into the car.

Please let us know happens so it will help others.

Best, Ken