S 10 (2003) 4 wd pickup

[Mark58]

Newbie here that needs little help,,
My S10 4wd is stuck in 4wd HI,,,pushing buttons and nothing,,,no relay sound like before,,just stuck
Thanks in advance

[MT-2500]

Welcome to AF

Is it the auto 4W or regular?
Any shift button lights on or blinking or come on for bulb check.
Any check engine or transfer case lights on?
Have you checked the 4W fuse?
Does backing up or placing transmission in neutral help any?

[Mark58]

Originally Posted by MT-2500

Welcome to AF

Is it the auto 4W or regular?
Any shift button lights on or blinking or come on for bulb check.
Any check engine or transfer case lights on?
Have you checked the 4W fuse?
Does backing up or placing transmission in neutral help any?

Sorry,
auto 4 wd
only 4 HI light is on,,pushing 2 Hi and nothing
checked 4 wd fuse,,,OK
Have not tried backing up,,in neutral and park same thing stuck in 4 HI
No additional warning lights on
Thanks

[Mark58]

Originally Posted by Mark58

Sorry,
auto 4 wd
only 4 HI light is on,,pushing 2 Hi and nothing
checked 4 wd fuse,,,OK
Have not tried backing up,,in neutral and park same thing stuck in 4 HI
No additional warning lights on
Thanks

Just went out and tried in reverse,,,nothing,,put it in neureal and BINGO,,working fine,,,LOL
Thanks

[MT-2500]

You are welcome.
Glad you got it to shift.
Could have been in a bind from driving on dry payment in 4W.
Do not use 4W on dry payment.
And use auto mode most of the time for slick higway driving.

Make sure your tires are a matched set.

If it gives any more problems get it on a transfer case scanner and test it out and check for codes.

The Auto 4W needs serviced ever so often with the new blue GM transfer case fluid.
Good luck

[Mark58]

Originally Posted by MT-2500

You are welcome.
Glad you got it to shift.
Could have been in a bind from driving on dry payment in 4W.
Do not use 4W on dry payment.
And use auto mode most of the time for slick higway driving.

Make sure your tires are a matched set.

If it gives any more problems get it on a transfer case scanner and test it out and check for codes.

The Auto 4W needs serviced ever so often with the new blue GM transfer case fluid.
Good luck

Thanks,,
Snowing like crazy tonight,,went to store and it will not shift out of 2 wd,,,
Got to store and tried 4 LO,,works ok ,,,,while moving it will not shift from 2 wd to 4 HI
Thanks again

[Mark58]

No luck,,tried shifting into 4WL and both lights 4 WHI and 4WH LO stay on?

[MT-2500]

You will need to get it on a transfer case capable scanner and get codes and see what is going on.
Post back any codes.

[Mark58]

OK,here is what I have done,,,Read,read and read some more,,Lot's of great info on this site. Now to the issue.
Since I didn't know where to start I took the Battery out,removed the battery base plate,looked at the Vacuum actuator and it was Sucked in with engine off. Is this normal? I disconnected the cable from Vacuum actuator and it stayed sucked in. Used jumper cables started the truck and BINGO ,,,I could switch between 2 HI to 4 HI. of course 4 Lo NO GO. 4 LO is not an issue for me right now as long as I can go from 4 wd to 2 wd.
Do you think Vacuum actuator is my problem?
Thanks

[MT-2500]

You need to get it on a transfer case scanner and read codes and do the shift test in the scanner.

Post back any codes.