We had a 2009 GMC Yukon come in with an intermittent tick on a 6.0
We pulled her apart and replaced lots of parts. Here Sesar is using a vacuum to clean dirt so it does not fall in the engine
Here it is with the heads off
All the parts were super organized
When it was done the tick was gone. The truck continued driving down the road for another 200,000 and is still going with over 400,000 miles now. The owner drives the truck almost 500 miles per day.