00 Suburban won't shift out of 4wd

[TransAm12sec]

My friends got a 00 Suburban, and it won't shift out of 4wd. What are some of the problems that could have caused this? Just tell me something.

[84hurst]

Electronic shift I assume? I think the switches were common problems on them. Do you hear anything from the T-case when you try and shift out of 4wd? If not, I'd say it's probably the switch.

[TransAm12sec]

He doesn't hear any noises.

There are no service 4wd lights either.

[84hurst]

I'd go with the switch then. If it was a mechanical problem, you'd probably hear it. Idk if the parts stores would have a switch, it's probably a dealer only item. Hope it helps! :thumbsup

[TransAm12sec]

So this would the be the replacement part?

http://www.1aauto.com/1A/4WDrive/Chevrolet/Suburban/1AFWA00004/459030

[84hurst]

I was thinkin the switch that goes on the dash. We should get a second opinion...

[Breecher_7]

Id first get in the fuse box and check if there is a relay for the T-case, if not and its not making ANY noise, it could be either the switch or the motor/solonoid, whatever that truck has. If you have a multi meter you can check the switch very easily to see if that is the problem.

[BAD LS1]

does the 4 hi light blink all the the time? If so there is a procedure in the operators manual to follow to correct it.

[johnny--2k]

My 96 Tahoe did the opposite where it would not go into 4HI or 4LO with the electronic switch.

It ended up being the actual module on the t-case. $250 @ the dealership to get it fixed.....

[A B4C Z]

usaully with the switch problem .It would every once and a while throw the service 4wd light with no codes. Then you replace the switch. Yours kinda sounds more twards the motor not working on the front diff.

Kyle