[QUOTE=05blackduramax;341203]Only code is left rear speed sensor.[/QUOTE
On the DIC it says service 4wd,service air suspension,service brake system.

 

This is where I found that pic: Need Help! Hummer gone nuts! - Hummer Forums by Elcova May not help, he fixed his by driving off-road over big bumps, so he's got something loose somewhere. But there's other info about remote starters and the like.

 

Hears the fix guys I told the dealer to order a new bcm from GM he did it fixed everything I can't believe that little bcm can do all of this. I hope this can help others.

 

I have the same problem on a 2007 it started right after I replaced the front wheel bearing can some one help me

 

To check for a defective ABS sensor on the wheel the best way is to unclip the wires from the sensor and connect a DVOM on it and spin the wheel. Note the wave form and then do the same for the otherside to compare. Now IF the waveform is not the same then figure the sensor is bad or the ring wheel is bad/broken/dirty. Now if the socalled defective sensor is GOOD. then suspect the wire going to the ABS module might be resisted or bad connection or NO connection. To test that check the wire values from the sensor (unplugged) from the sensor and all the way to the PIN on the Plug that hooks to the ABS module unplugged. Your basically checking the ohm value to make sure they are within tolerance. You can always compare those values to a known good leg or circuit of the ABS system to verify. Its time consuming but its the ONLY way to verify problems to validate the good and the bad. Faluty diagnosis always wastes lots of time and money. If you have already changed out the ABS Module we can almost assume its not it but another culprit elsewhere. I say almost..as the rebuilt one is not fully tested to show clear codes thats why.

 

Your going to have to recheck your work on how the ABS sensor is positioned. Did you knock it further than it can read? Was this a complete hub assembly you bought? Could be the sensor is bad and you need to return it.