How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask GMTechBernard Your Own Question
GMTechBernard, Shop Foreman - GM World Class Tech
Category: Chevy
Satisfied Customers: 2158
Experience:  GM
Type Your Chevy Question Here...
GMTechBernard is online now
A new question is answered every 9 seconds

How do I reset the 4wd service on my 2005 silverado

Resolved Question:

How do I reset the 4wd service on my 2005 silverado
Submitted: 7 years ago.
Category: Chevy
Expert:  GMTechBernard replied 7 years ago.

Really no way to reset it. If you turn the vehicle off and then back on, it will turn the light off as long as there are no faults present. As soon as the Transfer Case Control Module (TCCM) detects a fault, the Service 4WD light will come back on.


To diagnose why the message is coming up, it will need to be scanned for codes. I would suggest an inexpensive code reader or a trip to a parts store that offers "free code scans", however, the TCCM cannot be accessed by a generic OBD-II code reader. It requires a high-end scantool or the factory scantool (Tech2). This is the only way to know for sure, whats going on. 90% of the time, however, its the range position sensor in the Transfer Case (also called the Encoder Motor Sensor). The transfer case does not have to come out to replace that part, only the electric motor that hangs on the bottom.

There is also a software update for the TCCM that addresses multiple concerns, however if the sensor is bad, the software by itself won't fix it, and the software update must be done at the dealer.


Please let me know if you have additional questions!

GMTechBernard and 5 other Chevy Specialists are ready to help you

Related Chevy Questions