My 99 GMC Suburban is quick shifting and it is my understanding that there is a switch somewhere that signals the VCM when the transfer case is in low range to alter the shift points to compensate for the lower gear ratio. Is there someone out there that can tell me how to disable the switch to see if that is the reason that my transmission is quick shifting 1-2/2-3. I have looked and can find nothing on the transfer case that looks like it could be the switch in question and I have found nothing in alldata. Any help would be greatly appreciated. If I can get this thing straightened out by Thurs. afternoon it will make the trip to the mountains a lot easier. Thanks in advance for any help.