my 97 gmc yukon has to be put in reverse to engade the 4x4 and it seems to want to kick in and out of 4 weel drive

15

Asked by dragal Jul 23, 2012 at 10:12 PM about the 1997 GMC Yukon SLE 4WD

Question type: Maintenance & Repair

it has the 5.7 vtech engine as far as i know its all stock

6 Answers
25

Darrin answered 13 years ago

Sounds like shifter linkage.At least thats the first place id start looking.had that problem with older chevs 80s models

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Andrew answered 13 years ago

Do the lights on the buttons switch from 2 to 4wd? or does it stay lit up on 4wd and feels like is disengages? That system has an electric motor that changes transfer case gears, your push buttons, a TCCM (tranfer case control module), and a vacuum diaphram that engages the front axle. The vacuum system tends to fail due to broken lines or diaphram

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15

dragal answered 13 years ago

The light terns in at first then light terns off and seems no kick out the 4x4 and it also whont go in to 4 hi at all

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Andrew answered 13 years ago

So you have 2hi and 4lo? Never 4hi? If so this is a sign thay the shift motor is bad.

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