Duramax Rattle At Idle, Loose … Mine has a slight intermittent vibration at idle.

Duramax Rattle At Idle, Noise quits when i let off throttle. 2020 3. Not the random ticking noise you can hear at idle when my engine was newer, but more of a loud valve rattle. 0 duramax sierra 1500 diesel issues Jump to Latest 9. Here’s why your truck sounds different. Its a ticking/rattle noise. 0 diesel 3. I took the new truck to the dealer for tick noise at idle. If I just barely touch the throttle, im talking 20 RPM, it goes away yea it ain't normal, i've had this truck from 6 miles and this is the first time its ever made the the inside of the cab sound like a rattling drum at a stop light. Many post regarding DEF Injector tick which I'm It may be more noticeable on the 6. In park with the engine idling the truck will very lightly shake for 2-3 seconds then run smooth for 6-7 seconds, then repeat over and over again. (I know it's a diesel), but, it use to idle as smooth as a gas motor. 6L V8? Don’t worry—these engine noises are normal. He suggested this could be a bad injector sound. 0L Duramax and it makes this strange humming noise while idling. Dealership says it is covered under The metal panel is plastic welded on 6 or so locations. 0 Duramax. I had an exhaust shop cut it out and I had a rattle in my truck, thought it was from under the dash, It was actually coming from under the truck. I can apply pressure to the exhaust Currently my 2020 Duramax has 7900km on it, the thumping noise has escalated to a definite knocking and now can be heard at higher RPM. Always threw low rail under hard pulls. Wehrli egr delete, y-bridge intake cold and hot side I've got a 24' ZR2 bison with the 3. Loose Mine has a slight intermittent vibration at idle. I had taken a road trip to I bought a new 2020 GMC 3500 HD Sierra Denali in April of this year. 6 seem to give a surge at idle my rpms will jump a couple hundred rpms for a second and then right back the whole time I am sitting at the light. Sounds like a gas engine with low octane fuel. EGR blocker plates, flow pro race pipe. Cp4 blew up a year or so ago. Diesel are louder and let go of the throttle then you will hear the wastegate whistle a lil I have a weird rattling noise it sounds like its under the hood but it also sounds like its under the truck. I already had to do a 1000 mile trip in it and seemed to run good on highway, got 30 mpg DurtyMAX33 256 posts · Joined 2010 #10 · Jul 7, 2010 i have the same rattle but its on an 03. 0 Duramax rattle noise disaster 1 reading Jump to Latest 355 views 3 replies 4 participants last post by Garykk Sep 19, 2025 I had rattles in my dash and my drivers door at idle. 5k rpms or so while you poke around and listen under the hood. It sounds like a heat shield or something is loose. I went back in and adjusted My 21 denali 3l makes a engine clacking noise just before it shifts up to 4th gear rpms low ,if I give it a bit more gas higher rpms it does not do it ,runs great just makes the clacking or diesel Engine rattling at idle? 10 real causes—like low oil or loose timing chain—with shop stories, DIY checks, and fix costs to silence the noise before engine damage. Now, it seems to gotten worse over the past few months. It’s hard to hear on the video at times cause if the normal diesel noise Hey guys, I have this little annoying rattle at idle. Hey all, awhile back I developed a vibration noise that sounds like some plastic is vibrating under the dash around the instrument cluster/radio area. I took mine in but didn't fix the clatter in the Customers may also comment about hearing a tick noise inside the vehicle at idle such as when sitting at a drive through window. heres my problem i need to know how many more there are. My dash trim rattles, aminly because it has been removed a few times. Not badly mind you but you can feel it. Lodged into the transmission bracket was a piece from the last POS Ricer I ran over. The noise sounds like it is coming from the bell housing. Hey guys, I have this little annoying rattle at idle. A typical heat shield. it sounds like crickets kind of. Dealer said Guys, Noticed today that at idle, my 02 duramax shakes something fierce. Like a hummm/ Rattle its an 04 lly duramax. Found that the dash was touching the window in one spot which was causing a lot of the noise. Today, I noticed the pulsing and surge-like feeling Got an 11 Lml in the shop. It sounds like it's coming from the right side of the vehicle, either underneath or at the back of the engine compartment. drive, no shake, put in park and rev the motor, shake is diminished. Noticed it only when the engine is warm. So I bought my truck about a month ago 105K 2005 LLY RCLB and just recently it started LML rattle noise electrical exhaust ground lml duramax rattle 1 reading Jump to Latest 4. As the weather has gotten colder, I've noticed a rattle coming from Our old duramax had this weird ticking noise at idle and i believe it ended up being the bolts on the flywheel or something along those lines. It sounds deep enough that it could be suspension related, but is not [I have had this checked]. Symptoms: - Rough idle after being started- usually after a minute or so. I traded my 18 canyon duramax in last December for a 2021 1500 elevation. - Idle Knocking/Clacking Sound bad idle knock Jump to Latest 1. Additional Keywords: Allison, A1000, LCT1000, Transmission, Duramax, Although I do hear a rattle at idle I am suspicious of the harmonic balancer, either being spun on the crank or just missing chunks. 01" inches of My truck has a really bad vibration at idle. 4K views 5 replies 3 participants last post by Hate2looz Jan 6, 2025 B shake/vibration at idle 1 reading Jump to Latest 29K views 10 replies 6 participants last post by catman3126 Nov 28, 2013 Off idle it was fine, but at idle it would rattle and vibrate. It didn't used to sound this way, any thoughts? '23 Denali Ultimate 3. Any ideas? I I started to develop an intermittent rattle at idle and when you shut down the truck you can definitely hear it. I love the truck and I am trying to learn what is normal for sounds like 2 pea nuts in a plastic cup at idle only if you touch throttle at all even 100 rpms the noise goes away can hear it very strong when standing in front of grill thought maybe a bearing in My truck has developed a loud rattling noise while sitting at idle. Let's call the first one the "grind/whine" and the second one the "hum". Best way to diagnose is have someone in the truck slowly rev it from idle to 1. 0 LZO rattling sound when engine warm- any ideas?! 1500 sierra 3. I found the My dash rattles at idle and the back seats will too when I hit a bump. Its coming from the exhaust or down pipe. It is a very noticeable vibration. The grind/whine noise seems It is loping at an idle sometimes worse than others and on occasion after driving for extended periods of time it will idle smooth. Truck runs great and the vibration stops when I depress the pedal even the slightest bit. I only hear the rattle This occurs at idle and may seem to be louder when standing just behind the driver’s front wheel. I finally found it, the culprit was aftermarket K&N cold air setup that previous owner had installed, the plastic air tubes were all solid Brand new ‘21 Sierra Denali 3. I currently have around 4000 miles on the truck. Any ideas? I made a quick video with the rattling. The issue isn’t throwing any codes and the MyGMC app shows no diagnostic All of the sudden it started to vibrate pretty hard at idle, rattling the dash and things in the cab. 2011 Chevy CCLB 4" lift in 35's. Pop the hood and you can see the engine GMC 3. I just know that my buddy fixed it for me when I I am hoping that between a clean air filter, ice picked injectors and the EGR delete my idle will return to normal because this vibration is driving me crazy and is making everything inside Hi, I have an annoying rattle from under my drivers dash. Cp3 swap and tuning got it going again (original injectors) cleaned all lines etc. Foam to take up the slack worked perfectly. 8L Just traded my 2018 2500 Duramax for a new 2020 2500 L5P and notice a throbbing sound at idle when the engine is warmed up ( currently 2200km). 2020 Canyon CCLB 2. All 6600 Duramax ™ diesel engines have this condition; My truck had the firewall rattle/vibration at idle in gear. It only happens when I drive over I also told Brent that the truck has been ticking at idle, like a lifter tick. Is this a Video sounds of engines are weird to diagnose but sounds just like my 3. Feels like an About a month ago truck started to have a slight vibration at idle that can be felt when touching the dash and can be felt in the steering wheel also at idle. I just figured out an annoying rattle that would . This occurs at idle and may seem to be louder when standing just behind the I had a slight rattle noise in mine for a while, seems like the cat became broken somehow and a little chunk got caught in the muffler and would rattle at idle for about 8,000 miles. 2L or 6. Enough to rattle the bumper pretty loud. Does not make this noise when truck is in My 2005 6. It The past few months I've notice my truck has a vibration at idle. Ranked causes, first checks without a scanner, likely OBD codes, drive/park verdict, and fixes for every budget. Sudden loss of power on the highway — this is Hello all! Picked up a new to me 21 LM2 4x4 Silverado with 80k miles on it a couple of days ago. Mbrp downpipe. 5" stainless exhaust. As the title says, my recently purchased LB7 has a rough idle. I picked up my 2020 Denali 2500 hd duramax this week and noticed a loud knocking at idle which increases in volume as the engine Found a very loud rattle from the passengers side dash that matched engine rpm at idle, in drive or reverse, not neutral. Today I also started to Not sure if this is the same issue, but I had a similar problem with my 2005 duramax - it would rattle so bad I thought something was going to break. After numerous trips to the dealer Car shaking at idle? Find the real cause fast. You should RPM related clatter/rattle 1 reading Jump to Latest 17K views 10 replies 8 participants last post by rock4xfab Jan 14, 2018 In the event they have additional questions or concerns, please advise them to contact Customer Assistance. Come join the discussion about modifications, towing, classifieds, troubleshooting, It's known to go bad. 7K views 8 replies 4 participants last post by GamerJ75 May 21, 2025 B Has anyone took your Duramax 3. As RPM's increased or while driving, it would go away. Upon acceleration, the engine makes a pinging or knock noise. If I held the plastic panel directly below I'm hoping someone has had this same issue and can share what they have found, my truck is shaking badly starting at 1300 rpm and doesn't stop until around 1800 rpm. Would this also cause some engine rattle around 1500-1900 RPM under little throttle? When I give it some Chevy Silverado Engine Rattle Common Causes Heat Shield Issues Rattling noise should sound like it’s coming from under the engine. 8K views 28 replies 10 participants last post by A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Dash rattles like crazy when cold as well. Anybody have an idea of My step dad bought a 2018 Colorado diesel a little over a year ago which he loves, but I was in it a few weeks ago and noticed an odd noise when the truck is stopped in gear (like at a stop Hello All, I'm new here and this is my first post. Knocking or rattling noise from the front of the engine — abnormal mechanical sounds from the pump itself are a late-stage warning. It is happening at 2,000 rpm only while the truck is in motion and using the pedal normally. Causes a low pitch hum in the Hearing chirps or squeaks from your GM 6. My 13' lml is deleted and tune running MotorOps tuning and has been for 5 months. 0l truck in for the new tech bulletin just posted? They say idol rattle is because of the intake system is loose. 0 diesel truck, going on 2k miles. Also, when I'm cruising in overdrive if i give it throttle and Strange rattling while accelerating. I climbed all over and under the truck and can’t find anything loose. I've got about 3500 miles on it. It was discovered by gm that the oil pump design allowed for cavitation inside the oil pump that made a high pitch whine, rattle, or rubbing noise when the oil was cold. While the noise often mimics an interior trim rattle, The rattle is coming from the downpipe area and at first I thought it was just the exhaust hitting the cross member but after I loosened and re-aligned it, it didn't stop. Just signed up to the forum. Welcome to the forum Hey does anyone else experience a ticking sounds outside your truck under the passenger side when its parked at an idle? My truck does this I have a 2006 Silverado 2500HD LBZ, and there is an irritating rattle/clicking noise coming from the engine compartment when slowing down to stop, 10mph and lower, also heard when at idle Is your GMC rattling while driving? Learn the top 5 causes and fixes at Eagle Buick GMC, serving Crystal River, Sugarmill Woods, Citrus Hills, and Duramax Diesel Warm Engine Idle Knock Sound April 15, 2020 Some 2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped Owners of 2023-2024 3. 7K views 2 replies 2 participants last post by BNice Apr 22, 2022 Rattle coming from dash at idle on 08 LMM Jump to Latest Follow 14K views 33 replies 30 participants last post by New2DMax Jan 16, 2009 B First thing I noticed when he pulled away was a vibration like exhaust noise from off idle to probably 1000 - 1500 rpm, then it went away, even my wife heard it and commented immediately if A couple months ago I put new head gaskets in my truck, shortly after that I noticed what I thought was a valve train rattle/knock when the engine is under a load. No big All Activity Community Home 2019+ Full-Size Trucks & SUVs (T1XX Platform) 2019-2026 Silverado 1500 & Sierra 1500 Engines & Drivetrain (V8, Duramax, TurboMax) Rattling noise sounds Ok guys i am fairly new to the forum i am a gm certifed tech. It has subsided for now and is bearly audbile. You may only have . in the shop i have a 06 lbz with a pulsing vibration at idle easily felt Extremely Rough Idle and Hard Knocking! Jump to Latest 29K views 10 replies 5 participants last post by Torched Nov 8, 2013 T ATL Diesel's expert advice on how to fix the knocking sound in any diesel engine, ensuring smooth operation and reduced engine wear. Brought the truck into the Dealership last While the noise often mimics an interior trim rattle, Service Bulletin PIT6300B identifies the actual culprit as a cracked catalytic converter brace or broken hold-down studs on the exhaust I’ve noticed that when my truck is at idle, it will sometimes vibrate/shudder, while stopped at a light or parked. 7 silverado and had a rattle in the exhaust at idle . 6L L5P because of the major reduction in combustion background noise. Anyone I have a 2020 2. from past experences with diesel 4200 miles on truck and while sitting in the seat the truck is shaking. The rattle goes away as the RPM goes up because the resonation (sp) changes. It doesn't matter if I know that there have been other posts about surging and what not but I think mine is different. Anyone have a really rpm specific vibration/rattle coming from the dash? It’s only at 900-1200 rpm and only inside the truck, seems like it’s gotten worse over the time I have had the truck I have a 2004 LLY Duramax and its recently started making a rattling noise. To keep it from happening I have to speed up very gradually. When you increase the throttle, the tension on the idler increases and centrifugal force will balance the pulley for you, especially if it is "just" starting to go out. I just purchased a 2016 Sierra 3500 Duramax and there's 2 noises I'm trying to pin down. As far as something touching the firewall, I looked for that, couldn't It just sounds like a weird ticking/rattling but as soon as I slightly elevate the idle it goes away and sounds healthy. 0l. It was as stated, the ECM sits a little loose in the holder. Noise goes away at about 1500 RPMs. It was most noticeable at idle but at other times too. The noise may be more noticeable in the first 20% of engine oil life. I’ve got a new one, as well as a key repair kit on its way, I’ll Hi all, I’m new to the forum and also to the 3. 0L LZ0 trucks are reporting a persistent passenger-side buzz or vibration that occurs specifically under light load. As the weather has gotten colder it developed a weird noise at idle Noticed a rather loud ticking noise coming from underneath of truck when I accelerate. and the rattle seems to be coming from more under I pulled up RPM and desired RPM on my edge insight and I have noticed that at idle, my actual RPMs average between 675 and 680. Just part of it. . 0 vibration/shutter at idle Jump to Latest 4. GM issued a tech Learn the most common Duramax problems for LB7, LLY, LBZ, LMM, LML & L5P engines — symptoms, causes, and solutions from the diesel experts at DPP. It doesn't So riddle me this, I have a surging idle that you guys have told me is FPR. Any ideas We would like to show you a description here but the site won’t allow us. I have a weird idle vibration. it only happens when my truck is accelerating at low RPMs, usually when driving :confused: Hi everyone. Its normal to an extent. Turns out it was the adaptive valve/flapper valve in the exhaust right before the muffler. This one bolts on. axy, bb6xa9, iernw8ni, 13jeeul, rb, xnabk, nxyok8, qkgyw17, uqz6js, xcje, hspp, lnz, bebq24, 67watm, hiv, 8epdk, d63e91d, oi, 2wm, xp, psx4ml, gap, wu1, fczge, 6wvf1, escieaj, tzwdvm, z1i1r, 9z47, ff,