Service four wheel drive, code C0379

Tiny
REED MORRIS
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 400,000 MILES
Service four wheel come on and stays on. Four wheel will not work. I have replaced control switch and front axle shift actuator. Code c0379 comes up. Help please!
Wednesday, April 10th, 2019 AT 4:36 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Hello,

There is a ground wire that goes bad on these. to be sure here is a guide and the wiring diagrams so you can test the connections:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Friday, April 12th, 2019 AT 10:51 AM

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