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Service 4wd problem


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patrick young's Avatar
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Join Date: Feb 2017
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February 15th, 2017, 7:41 PM   #1  
Service 4wd problem

i have 2004 Chevrolet Silverado 4x4 z71 extended cab and the service 4wd indicator is on.
when i start my truck the lights on the 4wd switch comes on and then goes right back off. so i changed the switch and that didn't fix the problem so i changed the transfer case module and still doing the same thing. any ideas?

 
tech2's Avatar
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February 15th, 2017, 8:30 PM   #2  
post the codes set in the transfer case control module.

 
patrick young's Avatar
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February 15th, 2017, 8:30 PM   #3  
what codes

 
tech2's Avatar
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February 15th, 2017, 8:34 PM   #4  
if you have a fault in the 4wd system; the module that controls it may detect a fault. checking for codes is the starting point

 
patrick young's Avatar
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February 15th, 2017, 8:34 PM   #5  
i hooked it up to my obd2 and no codes

 
Allmotorbeas's Avatar
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February 16th, 2017, 5:13 PM   #6  
I'm having the same problem, 2004 crew cab 4X4. I only have 70,000 miles. I ready replace the button switch know I don't know what to do or just take it into the dealer?

 
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