2001 3500 4x4 battery light on no blower fan no gas gauge, no temp gauge, 4x4 buttons don't work. everything comes on periodical then shuts off

You may try this.

Here's the throttle body relearn procedure

Clear the PCM adaptive memory
1) Disconnect the negative battery terminal.
2) Run a jumper wire from the positive battery cable to the now disconnected negative battery cable terminal. NOTE. Do this with the negative cable DISCONNECTED from the battery. The short circuit you're creating here is designed to drain all power from the capacitors inside the PCM. Leave the jumper connected for about 2-mins.
3) Reconnect the negative battery cable to the battery.
Turn off all electrical accessories before proceeding. Turn off headlights, blower motor, radio, wipers, etc.
4) Turn the key to run and wait for all warning lights to turn off. During the period the PCM will command the throttle body plate to sweep from full open to full close to "learn" the new positions.
5) Start the engine and let it idle for a full 10-mins until it reaches full operating temperature. During this period the idle may be higher than normal. It should slowly drop as the engine heats up. Watch the engine temp gauge and note when it reaches operating temp. Then continue to let it idle for an additional 5 minutes. It will continue to adjust idle during this period.
6) Drive the vehicle at various speed so the PCM learns shift points.

Try the fan blower. It should be inside the cab, on the passenger's side, under the glove compartment. Easiest way to check, when is not working, hit the plastic cover under the glovebox, if it starts, it is the blower. Sometimes you need the hit it several times, until you hit the actual blower.

does the car have automatic climate control?

Sounds like you have a leaking engine head gasket.

you have leaking head gasket if steam coming out of oil crankcase and milky looking oil

The exact same thing happened to me... my lights don't flicker but my A/C is having the same exact issues.... if you find out what happened please let me know as well.

It is OK for them to stop, a lot of cars get the fans going as a default, then once the computer checks everything, the engine temp is still low, the fans will shut off, and come back on when needed. Keep an eye on the temp gauge, and notice that the fans will come on when you stop at a light. Or city driving, they should never come on when cruising. And a lot of times they will run after you shut the car off. Just till the temp drops. Hope this helps.

The blower fan is powered by a 30 amp circuit breaker.Its in the box at the pass kick panel. Is it getting power through it? The blower relay is powered through the GAUGE fuse 7.5 amp. Check ALL the fuses. There is a 30 amp fuse that powers the ign switch also. If you get the blower working I think everything else will work.

i have seen this before its the igntion switch . on the lock and key but the switch its self wich is located under the plastic cover on the steering colume

Sounds like a bad blower motor resistor, or if you have electronic temp control, a bad control unit.