Hi Mr. Skillman I have a 05 Chevy Tahoe that smokes on occasions when I start it up after setting all day 8hrs to be exact. it smoke just for a little bit as in a few seconds then goes away any ideals???

pray it's just worn valve seals inside the engine. But check for head gasket damage as follows: https://www.youtube.com/watch?v=QA7KVQq9vKA