Hope this doesn't go without a response. I've been having a difficult time trying to figure out how to post a new thread. I have a 99 blazer. It just recently got stuck in 4 low. Can't get it out. Checked the actuator under the battery. It works just fine. Replaced the actuator/solenoid on the firewall. Still can't get it out. Tried just about everything now. This is just one of the many issues I have with it. But, this is the most pressing at the moment....

 

I fixed it. I'm only hoping that what I did will help others with the same problem. I put the shifter in neutral after starting the truck. Held the 4lo and 2hi buttons for about 30 seconds. Then quickly hit 2hi after they were blinking. Did this twice and it kicked it out of 4lo. Hope this helps!!