my truck 4x4 is not working ,when i shift it into 4x4 i goes in but is not acutely in 4 wheel drive .

 

The 4 wheel drive actuator on the front axel might be bad

 

I am having the same problem with my '05. Had the transfer case and actuator replaced. Now I have an appointment with the Chevy dealer on Wed. Code came up my regular mechanic couldn't find on his equipment. I'll let you know on Wed. what they find.

 

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Please keep us posted of the results of your dealer visit. If you have any additional questions, please feel free to PM me.

Louis
GM Customer Service

 

It turned out I needed a wire replaced along with some bad connector pins. $300.