SWI-ALP 2004 GMC Yukon

Can anyone guide me to where the 32 pin connector is within the steering wheel column and how to access the connector?  Specifically, I need to access Pin B31.

Many thanks.  These forums are a great resource.

Thanks cntrylvr79 - that was perfect advice.  For anyone else that reads this you should note that a deep socket will make the job much easier - the 10mm bolts are tough to get at and a regular socket may not do the job.

So, I found pin B31 and attached the green wire from the SWI-ALP as stated in the instructions.  I also attached red to switched 12v and black to ground.  And I cut the brown wire.  But, I cannot get this thing into programming mode.  I see a voltage adjustment at the SWI-ALP green wire when the sterring wheel controls were pushed, I verified the SWI-ALP was attached to the Alpine head unit, and I verified that the red wire was getting 12V switched.  And, the brown wire is definitely cut and insulated.

When I push the mode button and turn the ignition on the light illuminates and then when I release themode button the light goes out.  But, nothing happens after that no matter what I do.  When I turn the ignition on and off (without pushing the mode button) the light flashes twice - I guess meaning it is in version #2.  I cannot figure out how to get it to flash only once as required for GM SUVs.

So far I have not adjusted the radio switch -it is still set to 0.

The PAC  instructions are not too helpful http://www.pac-audio.com/swixprogramming/showstepbystep.asp?RadioGroupPioneer=0&InterfaceChecked=2&mmSearch=GMC&Submit2=Search+Vehicles&ID=262

Any further guidance would be greatly appreciated.   

Appreciate the advice Ctoh.  I turned the radio switch to 1 and then retried everything.  It all worked perfectly.  The SWI-ALP is excellent - all controls from the Yukon work perfectly.  Thanks to everyone for helping me out with this.