Question about 1991 Chevrolet S-10 Blazer

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When I put my "91 S-10 Blazer into 4 wheel high it wont ingage.

When I try to ingage into 4hi it wont ingage. The light doesn't even come on. I use it last week with no problems. I am wondering if it might be as simple as a fuse? There is no type of noise coming from my transfer case or any thing of the sort. I looked to see if I might have lost a front drive shaft, and it is there. Please help???

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  • yhvh1313 Jan 05, 2009

    Ya know, I went out side and switched my heater from defrost to heat, and it finally went to heat. The strange *** thing is that my Blazer went in 4hi. Crazy... Not to sure why that is, could you please explaine it to me? Thanks Jefinerng..

  • jennifer godlewski May 11, 2010

    Is your heater stuck on defrost? (this really has something to do with the 4x4, I promise!)

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The 4x4 uses vacuum to lock everything up (as does the heater to switch from defrost to floor to panel...) If you had said, "no, the heat works great" I would have suggested that you have the selector switch (on the T-case) looked at. But since the switch from defrost to heater took so long, I think you may have a vacuum leak... I hope this helps!

Posted on Jan 05, 2009

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Sensor faulty on transfer case will not light up

Posted on Jan 05, 2009

  • greaseee Jan 05, 2009

    it could be caused by luck or you wires in dash were loose or penched by heater lever the movment helped it make contact to the 4 wheel button

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