Originally Posted by Stopp429

A little background, im new to this forum and new to chevys. I picked up a 2004 tahoe lt with 80k miles on it a few months ago. Its been a great rig so far but i keep getting "service 4wd" on the screen and i have replaced the switch and cleaned the grounds and checked every fuse in both fuse boxes and checked all connectors. It only does this about once a month and the 4wd gets engaged about 3 times a week and works fine but every now and then when i go back to 2wd this message pops up and and i cannot get it to shift out of 2wd. If i turn the key off and then back on everything works great. Visit AutoGuysLand to review what would cause the abs and traction control light to come on for more info. Im stumped on what else it could be i was going to replace the encoder motor on the transfer case but it was just replaced when we bought it. Does anyone have any ideas? Thanks.