I have a 2003 chev. astro van on a sunday evening it snowed. i covered the front with a cover to keep out the snow. mom. morning it didnt start for four days now its not starting its not flooded, have spark, changed coil.plugs,cap rotor t.chain good. any other ideas please help

Sounds like you need new shocks all around for the Swaying & Rough Roads stuff.
As far as the Ice and snow try snow tires but you have to realize its a pretty big car and may not handle very well in the snow.

Check for a blowin fuse , In the fuse box in side the car,

the heater coil is blocked up or hose is frozen

The windshield wiper circuit has an circuit breaker in it, under heavy load this breaker trips to protect the wiper motor, when the motor cools, the breaker resets automatically restoring proper wiper action.

you have damaged the gearbox mechanism by the sound of it ,on teh end of the motor is a gearboc and i think you burnt one of the tracks that self park hence its not working right and only a new motor complete will cure it as i dont think this gearbox cover can be removed on this vehicle

You need to replace the distrbutor cap and rotor.

You will end up destroying the transfer case, The transfer case is electronic and not mechanical as the older ones and the speed sensors will throw off the transfer case, if you lose traction to the rear end in the rain, snow or around a corner. The transfer case may activate and deactivate and without the front drive shaft could result in the transfer case to literately explode, also know as grenade. At that point, your looking at a transfer case and may be a transmission. You van runs on RWD unless the rear wheel start to lose traction and then the encoder motor activates the transfer case turning your astro in too a AWD. This was done to save gas, the older AWD transfer case was casing the idle arm to wear out prematurely and the gas economy was 17 MPG and the new AWD system that you have brought the van to 22 MPG. Why do you want to remove it??? if you do i guess you can disconnect the wire harness to the Encoder motor to the transfer case. Good luck and keep me posted.

Fuses are located up under driver side near brake pedal it has a pull down cover over them.

Not a lot that can be done about this. Its the Actuator inside the Doors. It gets cold and operates Very slowly. Not particular to any one Make or Model.

replace the ignition coil, I have a 2000 Astro that has the same problem, both times it was the coil.