The 4 wheel drive in my 1995 Chevrolet just quit working. Worked fine on its last trip, but I went out in the morning and it didn't work.

I thought my trans was going out . It would shift fine then it would stop working . Trans shop said it shifted to good to be anything wrong with it . I got mad an over filed it an it worked like a new one . I finally discovered it had the wrong dipstick in it .

Well you've lost power to one or two major circuits. Could be a problem with the key switch or a major fuse in the engine compartment.
I would check the fuses for power and find out which ones are dead then go from there.

How old is the battery & have you tested it?
How is it that a month went by & your using
any vehicle that could let you down?
Why have all issues not been resolved ,as soon
as they started?
Have you checked for codes?
Have you had a professional scan tool on it
& checked data,that has to be done along with
many other checks or tests,unless it's just a battery
issue.
No one can solve any vehicle issue over the internet
There is always more to the story & you need the patient

take cables off and clean then put back on

I hope for your sake it's the clutch master cylinder. don-ohio

Drive forward, put it in neutral, the into reverse. If you have not used the 4wd for awhile it will need vacuum to activate and disengage

Check for vaccum hoses attached to the cruise control module in engine compartment. These hose may be try rotted and your loosing vaccum when you activacte cruise control.

it may work again but that is only temporary it sounds like the fuel filter is clogging up

maybe not a call back is a call back!! have vin# ready call dealer to arange the call back repair I'm in a dealer ship I see it all the time as long as it was called back i can't say we but they will fix it!