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2003 Yukon Xl: 4wd Not Working

texascaddy

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texascaddy New Member

texascaddy

Posted
Posted

Greeting all-

 

My folks have a 2003 GMC Yukon XL SLT with approximately 130,000 miles on it.

 

They called me and told me that none of the lights on the 4wd switch (auto, 2hi, 4hi, neutral, 4lo) light up and "service 4wd" is displayed in the driver's information center.

 

I told them to check the fuses, then replace the 4wd switch and get back to me. The new switch has been installed, but the indicator lights still don't turn on. However, they said the info center no longer displays "service 4wd."

 

Ideas?

Stevens03 Senior Enthusiast

Stevens03

Posted
Posted

Actuator switch. I had that go bad on my 03 causing the Service 4wd light.

 

Do you have a way to clear the codes? That too worked for me once or twice to make it work again.

texascaddy New Member

texascaddy

Posted
  • Author
Posted
Actuator switch. I had that go bad on my 03 causing the Service 4wd light.

 

Do you have a way to clear the codes? That too worked for me once or twice to make it work again.

 

That thought had crossed my mind, but would that cause all of the indicator lights to go out?

 

It does not indicate which mode it is in, nor will it switch out of 2wd.

Stevens03 Senior Enthusiast

Stevens03

Posted
Posted

Yes... it will. I had no lights on my switch when the actuator switch went bad. Just the Service 4wd. I got lucky more than once by just clearing the code, and starting the truck back up.

texascaddy New Member

texascaddy

Posted
  • Author
Posted
Yes... it will. I had no lights on my switch when the actuator switch went bad. Just the Service 4wd. I got lucky more than once by just clearing the code, and starting the truck back up.

 

Thanks for the tip!

 

The actuator is GM Part # 26060073. I got this message on GMpartsdirect.com:

 

when replacing your original unit you will need harness part number 88959465 for 1500 & 2500's or 12376318 on 3500's when replacing the original unit. New unit must be wired up using new harness kit.(please check with customer service before ordering to insure you get the correct harness as olders models may differ.)

Again, the model year on this vehicle is 2003. Anyone on here had to get another wiring harness?

 

Also, can I get a pic of the location of the actuator? I'm sure I would not have a problem finding it myself, but this is my parent's truck and I live 1400 miles away...I want to make it easy on them.

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