Does anyone elses truck have a shack at idle, ive never had a vehicle with a large engine that wasnt modded. But for a 2007 bone stock tbss i dont feel that i should feel a shake similar to a small cam surge.
If it was a misfire wouldnt the computer notice and make the service light come on? A misfire is very noticable and any hot-rodder should notice the loss in power and a change in the tone of the exhaust.
My stock 07 w/ 60k miles shakes aswell, monitored scan data w/ current GM scanner (Tech 2 I think) and short & long term fuel trim are in spec 10% +-, & no misfire counters set (well maybe a few on cyl. #4), no ses light or codes. Guess thats normal aswell, gona try some NGK TR5 or 6 & a foaming intake cleaner but I don't expect much less shakin.