I have had no troubles as of yet after a total rebuild of the air ride its all been great, the only complaint i could possibly make is that my truck really dose not know if it is an lly or lbz as it was made during the big change up with duramax, but with all the reading i have done and what i have seen in front of me to date is that I have a lly built like lbz, stamped tagged and tuned as an lly... but if any body out there knows for sure what the difference is between the 06 lly the 07 lly and the 07 lbz , let me know... PS.. i have studied the duramax forums on this so many times now, i think i could write one myself
Production date on this incomplete cab/chas was 10/06, then it went to Monroe truckClick image for larger version. 

Name:	IMG00078-20120308-1338#1.jpg 
Views:	226 
Size:	64.2 KB 
ID:	36127