2005 Chevrolet Silverado 1500 Q&A

2005 Chevrolet Silverado 1500 Question: truck stuck in auto 4wd changed switch and still stuck any suggestions?

my service 4wd light came on while truck was in 2wd the truck then switched to auto 4wd on its own and the switch still wont work ive checked all the wires in transfer case and changed the switch it still wont do anything ive heard its the encoder motor or the module or the wiring harness i dont wanna spend tons of money and buy the wrong parts i need help please!? -
Answer 1
scan for codes and post so we can adv -