4wd switch all lights are on

What is your question?

2001 suburban and let it sit for month or so and when we started it the service 4wd light was on and on the switch all the lights are on and wont go off. changed the transfer case encoder ( i think its called ) the actuator , pulled fuses checked them all changed the switch with a new one , cleaned the ground wire,and still the lights are all on and it drives fine until it heats up and then when driving it feels like its changing into 4wd on its own could it be the TCCM? do i replace it with a reman TCCM or should i take it to the dealer and have them check it out ?

How long has your 2001 Chevrolet Suburban 1500 had this problem?

1 week