Mechanics

JIMMY WONT GO INTO FOUR WHEEL DRIVE

1998 GMC Acadia • 6 cylinder 4WD Automatic • 140 miles

My 1998gmc jimmy shows that it is going into four wheel drive and the drive shaft for the front differential is turning but my fromt hubs are just free wheeling can this be the vacum modulator and if so is there an easy way to test
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Dave321
December 31, 2010.




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