OK guys, now I've got the damn bug. :sigh: The "Service 4WD" warning came on and I thought, "No biggie. I'll check it out when I do my oil change. The 4WD gears probably just needs to be greased up or lubricated or something. :giggle: What do I know? I'm not a mechanic. Well anyway, I had my mechanic check it out last Thursday. He said it was an electrical issue, but couldn't figure out what exactly what was wrong and needed to do some testing. The 4WD was not working at all. If I try to engage any of the buttons, none of them work. Sorry, I didn't ask him what the codes were but he's still investigating. So tomorrow I'm taking it to the GM dealer (formerly HUMMER), they still have HUMMER mechanics so I'm hoping they can diagnose it since they work on HUMMERS. Too bad my warranty ran out in August. Got a funny feeling this might be on the pricey side. But I need my 4WD! Snow is coming soon. I'll report back and let y'all know what the verdict is. :roll:
Hummvee21, how did yours turn out? Incidently, this is the only thread I found discussing this issue on H4O. Isn't this a common issue?