Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello, my name is Bobby. Thank you for the question. There may be a bad part, a bad connection or the control module is failing. The most common cause is a bad connection. I would start by removing all of the connections on the encoder module on the transfer case. With them removed spray them clean with electrical cleaner. Then apply dielectric grease to the connections and reinstall. If the problem persists then we can move to another are for tests. Please let me know if you need more help.
Please let me know if you received my previous response and if you have further questions.