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Message: <blockquote data-quote="c_connery" data-source="post: 2353784" data-attributes="member: 813842"><p>my 4 wheel drive is not woking. i have a 99 GMC yucon and when i hit 4hi, 4low or auto 4x4 the light starts to blink i hear what sounds like the actuator working then the light stops blinking and goes away witch means the actuator never engaged at all, if someone could give me some helpfull advise that would be great</p></blockquote><p></p>