2003 Hummer H2 Questions

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I been here this sound it had rain a lot one day few months ago and I accidentally drove into some standing water and the lock gear and dove it the rest of the way home.
I had to pull fuse to shut off fan. How should I repair it?
Heating control automatically sets both sides to full heating
Although the display on the control unit is different.

With the Tech2 the servos are controllable.

Functions such as
-air distribution,
-fan control (also automatically),
-rear window heating
works without errors.

Recirculation does not work;
After pushing the orange light flashes - no reaction on the servomotor

Error codes B0229, B0408, B0418, and an old error code B0414
Also with the Tech2 not delete.

Air flaps are easy to move,
Servomotor exchanged for new ones;
Cable (wiring) tested for continuity
Voltages at the plug-in connections.
Replace the HVAC control element with a new one

Can it be that the system for safety on heating is caused by a special error?
Are there additional control messages from the BCM? - could the error be there?
Does anyone know a specialist for the Hummer electronics? Close to D-84359 Simbach

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Come on. The compressor sounds like it kicks on under the hood but nothing else happens.
Ran out on highway put gas in drive it 50 miles parked overnight now won't start fuel pump is new fuel filter is new ???
hummer dealer told me that my air sensor on the driver side was bad so I replace it and now the compressor don't even kick in .
Indicator light on dash stuck in park position but when gear shift is moved the srive positon the transmission will not engage
I was driving and my transmission stop pulling and the dash light moved to the parked position while vehicle was still moving but the transmission stop pulling and I coast to the sidw of the road
would like to find out if theirs a power relay
when I shut off the engine the power stays on
I replaced body control and problems still continue
I replaced body control mod and had it reflashed at dealer and still doesn't shut off code U1000
Low oil pressure in message center
Then the alarms start and sometimes don't stop the lights and all the dash will stop working also at times ..seems like it's electrical..what can I do??
Small vent on lower front left side leaks inside onto the floorboard & soaks it. Can we do anything ourselves to fix this? Also, is starting to leak a bit when it rains at the front left hand side of sunroof. Can we fix this ourselves?
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