2004 gmc yukon sle transfer case switch problems

[Bubba9]

Hey yall so I have a 2004 gmc yukon sle 5.3l with full time 4×4/AWD it has the 3 button switch my issue is the AWD light and 4lo light are illuminated and it won't let me do anything with the 4×4 system I have no codes other then a MODE SWITCH CIRCUIT FAULT its absolutely gutless if I put it in drive and go but if I manually shift it it runs perfect is my switch just bad or do I have other problems I've gone through everything and can't find any issues other then my buttons not working when I bought it everything worked minus the traction controll button and now this any help would be great TIA.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

 

[Miami-Dade]

@Bubba9 Moved you here. Intro section is only for intro.
Welcome from Miami&NYC!

 

[Bubba9]

Shoot my bad

 

[rockola1971]

Could be bad switch assembly or associated wiring. But could also have a bad/dirty encoder shift motor position sensor which is mounted on side of Tcase. Need a decent scanner that will show you what position it thinks it is in and go from there.