Brittany Quinn

2009 Chevrolet Trailblazer. Turn 4wd switch to auto or 4hi and the indicator light on switch just blinks then the service 4wd light comes active. Even switching from 2wd to 4lo ( with truck in neutral ) light just blinks. 2wd light stays on in all positions. While switching from 2wd to 4hi I can hear the actuator. So I think that's working. Checked all fuses, no issues there. Once the TB is left parked for awhile and you start it (in 2wd position on switch) the maintenance light is off.. until i turn the switch again. What's thoughts?? TCCM? Front actuator??