I recently had my ECM recalibrated / reflashed using T-SB-0373-09 (Transmission TSB dated Nov 3 rd.)
Well now it's not possible to disable VSC in 4WD-HI.
I used to be able to hold in the "VSC diable button" for 3 seconds while in park--now it does not work!
I think this may be an unintended side affect of the ECM reflash. Can some of you guys with the 2009 4x4's confirm this for me?
UPDATE: 12/23/2009 My problem has been solved.
I confirm that my problem existed... Took my tuck to the dealer for diagnostics... My truck sat for a day... The SA said the tech did nothing. When I picked up my truck the problem was gone. I have tested the VSC disable switch while in 4WD-HI and the problem is indeed gone. Chalk one up to PFM.