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Re: 2002 Silverado 4X4 Broken? Service 4WD Light
When a code is set the transfer case shifting shuts down.
Plowing is auto mode could have set the code.
After code was cleared recheck all shifting operation.
And yes check front axle actuator for locking front axle.
You may only feel a 4W bind up or crow hop in 4W high or 4W low mode.
Auto mode you may not feel it.
I wold also service the transfer case with the new GM auto trac blue fluid.
In some cases with bad fluid or servere service the fluid will need flushed and re changed.
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Remember proper testing gives us the answer to many problems.
MT
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