12dbsinad

Thanks guys, will take off valve cover and see if I see anything obvious. Today on way to work slight puff of smoke on start-up, barely noticeable. When I left I did not see anything on start-up. Yesterday it smoked like crazy, very strange. Will report back on my findings for anyone reading this in the future. Thanks.

2005 2500HD 6.0L 205K miles here. All of a sudden out of the clear blue truck starts burning oil on startup, fairly good cloud of smoke, but sometimes it does not do it at all. Has not done it for the past few days but tonight leaving work she smoked a real good cloud, then cleared up. Seems to run fine otherwise. Started about a week ago and as I said, sudden. Never any visible smoke before. PCV issue? I find it hard to believe it's valve guides? Suggestions?

Thank you all for the advise/help. I read another thread (not on this site) about a similar issue with a same vintage Tahoe having dash issues. Apparently there is a ground that affects the dash under the hood against the firewall that is a culprit of corrosion issues at the terminal, wire can still look attached but a slight tug and the wire pulled out of the terminal. Not sure if these trucks have that same ground but I will check that as well. Will also check relay/fuses. Drove the truck to and from work and to a appointment and never did it once but was fairly warm today (35-40f). My goal is to get it to do it, drive it in my shop and move ground bolts to see if it clears that way I have some sort of confirmation and not guessing. Again, thanks for the help and I will report back on updates so this thread can be as useful as possible.

Recently my 2005 2500HD 6.0L has had it's dash going crazy. Randomly, the ABS, airbag and brake lights will illuminate together with the ding chime. It sometimes accompanies the fuel gauge, oil pressure, and volt gauge going to zero and the battery light will come on. Sometimes the lights will quickly flash, other times they will stay on until I get to my destination. Seems to be worse during cold weather (below 20F). Trying to troubleshoot this. I've read it could be anything from a ground issue to a bad BCM or cluster. Anyone run into anything similar or have any tips/tricks?