I have a 2004 chevy trail blazer ext 4 wheel drive does not work used it last week and was fine

This should help

Turn ignition on and press the tune button ,when setting appear go to reset all .should reset the radio and alarm system.

Yes this kind of happens its a chevy thing mine dose it to .
Ball joints then to ware in these trucks I think this is why it dose it .
But your not supposed to use the 4 wheel on dry pavement especily in tie turns .
I wouldn't worry to much just try to not turn tight in parking lots going forward back up more to get were you need to be and don't cut the wheels to tight .Your ball joints will thank you

Hello
Check the wheel nuts - could be a loose wheel. Check tires for pits and such. Check the wheel bearings. If nothing take your car to wheel balance service - could be a balance weight came off the wheel. And if its still there take it to professional suspension check service.
Hope this helps.

did u try putting it in high low then putting the auto into reverse first then attempt to drive. had same problem with my truck

This vehicle is a chevy trail blazer , doesn't matter yours is in the same place an the samething .
Chevy Trailblazer EXT Blower Motor Won Turn Off

Typically it is a 255/65R/17 or 255/70R/17

Fill it all the way to the top, drive it for i day, and fill it up again. now you know how much you will use each day do it x 5 and you know how much you use a week. i would keep a empty plastic can in the trunk. comes in handy if you run out..

If you have it in 4 wheel drive on dry ground, that's how they act. Leave it in 2 wheel drive as much as possible.

pull atc 25 amp fuse in underhood fuse center and 10 amp 4wd fuse inside cars fuse box,your problem is in control box behind kick panel on pass. side ,corrosion build up,