2001 jimmy 4wd wont work?

when i push the 4hi button on dash u can here the tranfercase switch over and the 4wd light stays on but there is no 4wd. is this a vacuum problem.help its snowing like mad

The Bass Player2010-11-30T19:25:22Z

Favorite Answer

There's a diaphragm underneath the battery tray that engages your front differential. They are notorious for developing holes in the rubber due to battery acid leaking down on them from the battery.
If that's not it, there are vacuum lines that need to be checked out.