Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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Have you had the fault codes checked/read out in the transfer case computer at all for this issue here?
Let me know so we can continue,thanks Pete.
O.k.,the first thing that needs done here is to have the fault codes checked/read out using a scan tool that will plug into your vehicle and can read the 4wd computer (not all scan tools can do this so one that can do this is needed).There will be at least one fault code set that will help and lead to the faulty component here.
The most common causes on this year and model was the transfer case actuator on the side of the transfer case failing needing replaced or the 4wd selector switch on the dash itself.Usually it is the actuator on the transfer case that needs replaced or the position sensor inside the actuator as GM had released a bulletin on this sensor to replace it for a code of I believe C0327 that would set in the 4wd computer.
The sensor or actuator can be purchased at a dealer or parts store.The sensor itself is usually around $100 if not less then that but the actuator I have seen up around $400 in some cases.If you can get the codes checked in the 4wd computer and come back here and post them this will help.
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