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1999 GMC Sierra 1500 Question: my 99 gmc sierra switches show switched to 4 hi but wheels do not engage,

 

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Dougman5129, Sweet Grass, MT, March 16, 2013, 09:30
 Rookie

no trouble codes have come up did put a new stereo system in truck and had to remove battery positive for about an hour could this have caused it. not sure were to locate the fuses for the 4x4 system if there is any

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  • Answer #1

    March 16, 2013, 20:38
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     Technician

    sounds like encoder motor do you hear any clicking when changing into 4wd?if not I would suspect that or possible reflash computer at dealer

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