Question about 1997 Chevrolet C3500

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I can engage 4wd low but 4wd hi wont engage. - 1997 Chevrolet C3500

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  • rckjohns Nov 18, 2009

    I understand how to go from 4wd low to 4wd hi but the problem is that I can get the 4wd low to engage but I am unable to get the 4wd hi to engage. I can get from 4wd low to 2wd and back again but I can't get the 4wd hi to engage.

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Hello rckjohns.
The system on your truck has technical bulletins on both the push button switch to select your 4 wheel drive and the actuator/motor on the transfer case. In my shop it is around 80% motor issue and the rest the switch. There is a sequence of testing to pin down the problem but I generally like to do a visual and audible test first. Inspect the plug at the motor for corrosion or broken wiring.
Try pushing the buttons with key on engine off so you can listen to the motor on the transfer case operate. The motor must be partially functional because it does go to 4WD low. Does it make any noise when you activate 4WD high? If not I would home in on the switch first, but it still doesn't eliminate the actuator/motor. This could just save a little time in diagnosis.
Anything more than this will need a troubleshooting chart and a wiring diagram.
Hope this helps you along.
Thank you for using Fixya.

Posted on Nov 19, 2009

  • FUBAR Nov 19, 2009

    I should have mentioned where the plug is for the motor on the transfer case.
    The plug is behind and a little above where the front driveshaft comes out of the the transfer case.


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Hello. In order to go from low range back to high range you have to put the transmission in neutral. That should solve your problem. Regards, Joe

Posted on Nov 18, 2009

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Transfer case module causes this, first disconnect battery then wait 1 min reconnect and try 4 high should work till you can get a trained tech to fix.

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www.amazon.com/Chiltons-Repair-Manual.../0801981425


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SOURCE: front axle does not engage when I shift into 4wd

http://www.fixya.com/cars/t2084504-4wd_wont_work_1999_chevy_tracker_but

If you tracker doesn't require you to be in park or neutral when engaging 4 wheel drive then please try the link above.

Posted on Dec 21, 2009

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