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Won't shift into 4x4 2003 Chevy Silverado 1500


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I'm running out of ideas I have a 2003 Chevy Silverado and 4x4 won't engage. I have cleaned the ground wire under the driver door, replaced 4x4 push button on the dash and replaced the accuator and still no luck. What else should I check?

Edited by ahc
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2 hours ago, richard wysong said:

Is the transfer case engaging and not the axle or not? Which actuator did you replace? any codes?

Replaced actuator on the front axle. Transfer case is not engaging and no codes.


Edited by ahc
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