Four wheel drive is not working

Tiny
ODIE HINES
  • MEMBER
  • 1995 GMC YUKON
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 14,000 MILES
The four wheel drive will not engage.
Monday, January 9th, 2017 AT 10:46 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check the four wheel drive fuse and ilium fuse in dash. Then check blue wire on switch to see if that works and finally check blue wire on top of case to see if power is coming to it. Finally check gray wire when switch engaged to see if PCM it telling t-case switch to engage.
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Tuesday, January 10th, 2017 AT 12:25 PM

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