No Light on 4Wheel Drive Selector Knob

The 4wheel drive light on my 2002 Trailblazer LS had gone out for a second time. The first time (a week ago) I took it back to the dealership, they said oh it's not a big problem we just have to reprogram it. Well they did and it's out again. Without this switch I am unable to switch out of 2wheel drive, which really sucks in the snow. Has anyone else had this problem resolved? Is it do-it-yourself friendly or am I a slave to the dealership?

Last night the light mysteriously came back on. What's up with that?

Mine was doing that and the dealer had to replace the module

hey bill did you have to come out of your pocket for this repair or was it covered under warranty? Approx. how much for repair?

Mine was still under warranty so the price of the module was blanked out.

dang... thanks for the help.