Question about 1996 GMC Jimmy

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4wd will not engage, or engages intermittently. You can hear the click of a switch under or near the battery, but doesn't always engage.

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  • GMC Master
  • 1,149 Answers

Hi:
The main parts to the 4WD system are the transfer case, the shift control motor, and the shift control module. if you remove the shift control motor from the transfer case, and leave it plugged into the harness, you should be able to see if it functions thru all settings, such as 4wd high or low or 2wd. If not, then you need to figure out which part is bad, the motor or the control module. If it does work as it should, then you have some sort of transfer case problem.

Posted on Dec 10, 2009

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Posted on Jan 02, 2017

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