Hey guys, i've read over this article and i think i know whats going on here. But i seem to have a bit of a different problem on my 2003 GMC Sonoma 4x4 non-Zr2. My truck 4x4 lights all work, and i can go from 2HI to 4HI no problem. As well into 4LO. The problem comes when i go to shift from 4HI to 2HI while driving. The light will change on the dash, but then it doesn't seem to want to disengage out of 4HI straight away and after a bit of time, the front end will suddenly pop/clunk and it will then be in 2HI. I havent had time to pull the battery out yet and check the vaccum lines nor the actuator. but if anyone could point me in any direction of where to look (saving me abit of time) it would be greatly appriceiated.
Thanks!