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    anything with a motor
  • Drives
    2021 silverado 2500hd crew cab swb 4x4 custom 6.6 gas

Leem's Achievements


Enthusiast (2/11)



  1. Yea sounds like mine. passenger side is very audible. I dunno if the high pressure pump or its cam driven lifter is a different design. But sounds more like pump noise than the typical injector pulse sound. Who knows it "aint broke" so i just live with it.
  2. I installed a suspension max bracket and a non pressurized rancho stabilizer on my truck. It helped on uneven roads or roads in poor shape. My truck has had one sense 2000 miles on oem tires. Now at 3800 miles with 35 inch ridge grapplers I will say it helps not white knuckle the wheel on some of the roads i drive on. It certainly stopped a lot of clunk and took some of the floating numb dead space out of the steering wheel. I have full lock to lock on 35 inch tires no bind or forcing of the steering linkage truck is not leveled or lifted. For 160 bucks it made a good noticeable effect on how the truck drives now.
  3. Mine has this same tick almost sounds like lifter failing to hold pressure. And creating push rod slack .Seems to be less annoying when its cooler out say 50 degrees and lower. My 2019 5.3 had a tic but not like this one does. I went as far as removing the passenger valve cover to check the valve train. After hearing about GM valve spring issues. 3,800 miles no issues. Chocked it up to the character of the 6.6 l8t DI engine. OP did or have you changed your oil yet. Mine got louder after my first oil change. But has calmed down a bit as the oil gets older.
  4. Yes i have read that as well. Along with something about a fuel line with a check valve in it making a noise. And for it to be replaced. mine was built in June 2021. but still could have a valve train issue. Anyways if i take it in i will report back in what they find. In case this becomes a 6.6 issue One thing i am sure of its certainly not like my 1500s collapsed afm lifter or any broken valve spring noise. That can be found on the youtube. Not much info out there on these motors yet in the way of issues.
  5. Hate to bring this back from the dead. Specially being my first post. But i recently changed my oil using OEM filter and quality oil. I changed mine at 3k miles its a 2021 6.6 gas custom. And now i have a slight knock random only in park and neutral. Oil pressure is about 38 to 40 psi hot idle. I used a stethoscope on my heads and everything sounds good. I am baffled sitting there with the door open you can here a random knock or clank similar to a lifter but not like a AFM collapsed lifter on a half ton. Set parking brake in drive no noise return to park or neutral and i will have a random tap/knock sound. Dunno has me stumped went out and floored it oil pressure goes up as should no crazy sounds. no missing at idle or stumble. noise is not associated with rpm. Kinda crazy sold my 1500 at 39k after AFM lifter repair after dealer had my truck for a month. If any body ever has a chance to listen to there truck in park after a drive right around the bell housing and oil pan location for a faint but audible knock/clank sound please chime in.
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