1995 GMC Yukon Four Wheel Drive Not Locking In

Tiny
CONNIERS
  • MEMBER
  • 1995 GMC YUKON
  • V8
  • 4WD
  • AUTOMATIC
  • 133,000 MILES
I have this 95 GMC Yukon 2dr 4wd and the 4wd isnt locking in. I have no lights coming on to indicate I am in 4wd either. I found the actuator which I tested and I am getting power to but there is another switch mounted in the front drive axle tube which I am only getting power to 1 of the contacts. It is a 4 wire connector and I am assuming 2 of the wires are grounds. Could you help me as to if I should be getting power to that last wire and if so how do I test it. Thanks Connie
Saturday, January 24th, 2009 AT 6:37 PM

1 Reply

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
Connie on the front differential there is a actuator with a plug on it with 2 wires that goes to a actuator that screws directly into the front diff. If you have power at one and ground at the other then replace it, this is the front diff actuator and they go bad all the time
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Sunday, January 25th, 2009 AT 6:13 AM

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