Hey Guys and Gals! I have read a lot of the comments about the "Clunk and Pop issue" everyone is having out of their Chevy and GMC trucks. I had the same problem out of mine. I thought it was an issue with the yoke at the back of my transmission and the dealership greased that. It still clunked when shifting into gear and was told it was the nature of the beast. So I drove it. I now have 57K on it and it had started creaking and popping along with the clunking. I took it to two local shops and both told me they didn't know what could be causing it. I took it to my dealership this week and told them the problem. What the mechanic found was a transmission mount was loose and several suspension bolts were loose. They couldn't believe they were like that. He said they are supposed to be torqued at the factory but obviously that had not been done. After he tightened and torqued all of it, it did away with clunk and pop in the driveline and suspension on my truck. I also called GM at the 1-888-988-7267 number and told them of the problem. I mentioned that I had read a lot of reviews about this problem. I was told by the customer rep that they did not have a lot of complaints about this issue. If you have had this issue you need to call and complain about it. Calling them and letting them know is the only way the issue will get resolved. They will send the complaints to the factory so the torque issue can be addressed by Quality Control. Just thought I would let you know in case you are still having issues with this.