It an auto box and only drive if you use 1st,2de,3rd. Last owner said its stack in "snow mode" and it might be a fuse - Can any body help please

Great question.
PRNDL (is the cable good both ends) shifer>?
R good
L good?
Drive , selected and 1st gear car will not move ?
or 1st gear car moves good but will not up-shift.
1,2,3,4 gear. 1st slips or works??????????????
name 4T60 (transverse 4speed box) GM./
DIY?
check fuse first
scan the PCM (the PCM has TCM) the TCM tranny brain and if TCM is not happy it tells you why
so all carsChev 1992+ must be scanned, first.
the 4t60E box is electronic shifted. scan it.
what is miles on car.? 100k,300Kwhat?

causes are vast, (ever see inside any A/T box)
the next test in the book is pump pressure test
PRNDL

check the owners manual

possible 1st and 2nd trans solenoid or fluid/filter

On my 2012 Chev Impala the fuse box in the eng compartment has a vacuum pump relay where you are saying the fuel pump relay is

It has a siolinoid in the transmission that is suppose to gear it back down to 1st gear when slowing down or just pulling it in gear.

if your close or over 100,000 miles, better to have the tranny rebuilt.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

Well in a auto gear box you have in the pan on g/box a filter and a forward oil pump and a reverse pump also a set of bands forward and a reverse plus a valve body assy which has a load of small pistons and springs and oil ways ,but by the sound of your problem is that the forward pump isent going through the body valve for some reason so its taking a short cut and bypassing 1,2,3, and trying to to top first.
So sorry to tell you that the answer to your problem is you have to go to a Auto Matic gearbox shop and they will have to fix it ORget a second hand box and fit it yourself.
Let me know how you go. are you on Skype Ron

http://www.extendedgmwarranty.com/owners-manual/chevrolet/1999-Chevrolet-Suburban.pdf this link takes you to an online manual for your vehicle, after clicking on this link go to the "service and appearance care" and then "electrical systems" this shows you a layout of fuse box

Please rate my help, thanks

http://www.genuineservice.com/genuineservice/en/default?page=genuineService

Go to this website and pick owner guide on left task bar,input vehicle info then pick get owner guide. Pick owner guide 1st printing and your fuse info begins on page 179.

You will have to get hooked up to a scanner,trouble code is present causing trans. to go into safe mode.