To Kayakn:
Im not sure how close you live to CT but I have a Tech2 that you could use. I also have the F.S.M for your truck if you want me to take a look to see if there are any bulletins put out by GM for your issue. I know sometimes it may just need one of the modules (EMC, TCM, BCM, etc) to be updated with new programming to address the issue. Let me know, Walt