transfer case is allrite.what else could it be/ FRANK

 

If you have push button 4 wheel drive it is most likely the (4 wheel drive) solenoid that is going bad. It's the unit that engages the 4-wheel drive. It's a $180-$200 part from GM. If you can do it yourself you'll save a ton on labor.

 

In my '01 it would occasionally come on after startup and go right back out. I never had a problem with the 4wd. If it's throwing a code you should be able to get it read at your local Autozone/Advance to find out what it is.

 

On my 2000 when i bought it the light would come on but the 4 wheel drive worked fine. It was the switch in the dash the chevy dealer was able to read a code on it and then they replaced the switch and the light never came back on. So i would see if there are codes like cracker said.

 

I agree, get a code before you do anything.

 

I don't think an autozone scanner will talk to the transfer case module

 

Time to put it under the light and play good cop bad cop?
Will a Tranny shop have the equipment or will he need to visit a dealer?

 

just go buy a tech 2. kidden my truck after a hour of driving the service 4wd will come on and the 4wd wont work, once i turn it off and turn it back on it works fine no codes were stored

 

Replace the switch

 

mine showed the same code intermittently for a while. By the time I got to the dealership it would go away, but when it was there,I could not select 4wd. One time it even made the truck drive like it had no power and shifted really hard. It ended up being the encoder motor. Don't know what it costs though, under warantee at the time. Happened more this time or year on moist mornings.