I have a 1994 S10 Pickup, 4.3L Vortec engine.
When I start the truck, all 3 lights on the 4 wheel drive switch will illuminate as expected, and then the 2 wheel light will stay on.
If I push the 4hi or 4lo it will not switch in. This is a new switch, so I know it is not a problem with the in dash switch.
I went under the vehicle, and reseated the connection on the vacuum switch on the motor housing. It then started shifting in and out of 4 wheel drive, and the motor sounds fine.
It then all of a sudden stopped working again about a day later, and will not switch in and out of 4 wheel drive.
Any idea on whether this could be the vacuum switch that screws into motor housing, or could it be the actual motor that is going bad?
Appreciate any help you can provide.
SOURCE: s10 pickup 4wheel drive wont shift from 4hi to 2hi
Mine is on the front drivers side, is yours? I just about fell over when I discovered who they designed it!
SOURCE: 2001 s10 pickup transfer case wont go out of 4lo
Mine is acting up as well, a mechanic friend of mine said it was the four wheel drive actuator, and it was quite common he said
SOURCE: chevrolet truck 4wd switch blinks
If they are blinking I believe it means that there are fault codes present in the pcm. You need to get the computer scaned to see if there are an codes present. If you live near an Autozone or Checker autoparts they can scan it for free.
SOURCE: I have a 2001 Chevy 2500 4X4. Four wheel drive not
Sounds like the chain in the transfer case has broke or the linkage is out of adjustment
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