problem with my 4x4

My vehicle is a 99 jimmy with 4 button system.

Ok here is what happens, the truck starts out in 2hi I press the 4hi button, I hear a click from the computer on the right side, now the 4hi button continues to blink, it will continue to blink never switching back to 2hi, now if I press the 4lo button the 4hi will stay on and the 4lo will come on, but when I put it in gear only the rear end is in 4lo, the back tires will spin in 4 lo but the front end has no power.

It is as if the valve in the front under the battery box isnt working or I have a vaccum leak. Any suggestions?

Reply to
Adam F
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Have you checked for leaks?There's a hell of a lot of vac hoses in there.And that's a common problem.

Reply to
Dafey

Have you checked for leaks?There's a hell of a lot of vac hoses in there.And that's a common problem.

Reply to
Adam F

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