• Tiny
  • shawnodese
  • 1999 GMC Acadia
  • 6 CYL
  • 4WD
  • automatic
  • 190,000 miles

I have a '99 gmc jimmy SLE and I push the button to go into 4HI or 4Lo I hear it engage but when I drive only my rear wheels spin. What would cause this to happen. Can it be a simple vaccuum problem. The lights on the dash say I am in either 4Hi or 4Lo but the truck is still in 2wd

Monday, February 7th, 2011 AT 6:58 PM

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