Question about 1999 Chevrolet Silverado 1500

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Help! I think I broke my husband's 4 wheel!! We had alot of rain, the other day, so I drove in "auto 4wd". After running errands, I put it back in 2 wheel. Now when I try to engage 4WD, the lights just blink. What do I need to check to fix it???

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  • 23 Answers

My 99 Silverado did this same thing; All lights flashing
when switch is pressed. I ended up replacing the switch to resolve the issue.

I started at that point because I couldn

Posted on Jan 01, 2011

  • Mike Abrams
    Mike Abrams Jan 01, 2011

    If all lights are flashing when you push the button, try replacing the switch...I had the same issue on my 99 silverado z71. Keep in mind it could be something else.

    The switch runs about $65.00 and maybe higher or lower,(had to order) it been a few years; I had no other problems after replacing the switch and I still have my truck.

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no year?
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http://en.wikipedia.org/wiki/Four-wheel_drive

and with out such, winds up the drive line fast. and breaks it.

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Sound crazy, but alot recommendations say thet when you pass from Hi to Lo must insure that you have foot on the brake pedal.

Loss of vacuum engages the front hubs; other for no 4 wheel drive and no indicator light. Go home pulled all the fuses that had to do with the 4 wheel drive system, put them back in and 4 wheel seems to work fine now. And no there were no blown fuses.

I recently had same case and it was a bad electric motor on the transfer case (31000 miles). The 4x4 light wouldn't even light up or engage so I would lean towards it being something different on your end.
Also, could be the actuator pin or w/e the little plastic piece is that engages the 4LO might be broke, or maybe a couple of other things.

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Thank you for using fixya

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No probably not, first check the fuse for the 4wd in the fuse box if that's OK its likely the actuator on the front axle..........providing the shifter handle moves to the proper location and if its push button the lights light in the switch when selected...the actuator plugs into the wiring harness and screws into the front differential.an easy remove and replace part even for a novice.

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