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Found 3 results

  1. Hey guys, I got a 2015 Silverado 5.3l. 138,250km. started ticking sometime last winter. Would happen instantly at start up and last about 5 minutes then would fade away. Sounded like a lifter. Took it to the dealer they said they couldn't hear it. Sound went away so left it. Fast forward to this winter and as Soon as the weather started to cool down I noticed the ticking again. Took it back to the dealer said they couldn't hear it again. I went and picked up my truck right at closing, soon as I fired her up the sound was there but everyone was gone so no one to hear it. I took a video. Next day I called the dealer, sent the video. Took like a week to get back to me. In the meantime I had taken videos pretty much every time I started it. Long story short after a brief fight with them about them trying to say it's normal etc they agreed that it sounded like a noise coming from the valve train. Left my truck with them, they called me said they had to change all lifters. Went to pick up my truck and on start up the sound is still there. This was a month ago. Sent more videos and a previous video from before they did the work and they are saying they can't hear it again. Took it in in person they agreed that there's an issue again and they will look at it. Now they are saying it's possible bad injector noise but they can't figure out which one ?. In the meantime I took it to another dealership they changed the vacuum pump. After that the sound changed. Now it's no longer at start up but once the truck has reached operating temperature and is more of a dull sound. Took it back to that same dealer who did the vacuum pump and they said valve train noise and deffo not injectors. But they won't work on it because the other dealer already did. They didn't change the VLOM or the cam. I had/have no check engine lights. Truck runs awesome. Sometimes rough idle. Any ideas what it could be?
  2. Original owner, all stock 2015 2500HD WT 6.0 gas 190k miles. Cylinder 3 exhaust valve tip almost gone. Engine developed a low noise valve tick on start up and idle, 3k miles later, louder and at all rpms. Intermittent (twice) P0303. Removed valve cover, rocker arm and observed damaged valve. Roller lifter and cam journal showed no signs of damage. Of the eight valves, one destroyed and three others showing wear( pic 3) Inspected passenger cylinder head valve bank, no signs of wear or damage. Oil stain seen through exhaust port. Informed GM and assigned case #9-5190338716. The truck has been a solid performer and provides great service. The short years and high mileage may indicate future issues with valve lots that may be below specification. My plan is to replace all valve parts including lifters. Should GM want to inspect these parts, I will make them available upon request.
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