Hi all! My truck, 2018 Silverado 5. wth530 Discussion starter. I had this issue, minus the shaking, a few years ago. There is a shake or shudder during light throttle acceleration. I finally got to a safe place to pull over and do some checking. Oct 19, 2023 · Surging idle. Jun 8, 2022 · I thought odbII came out in early to mid 90's. The idle is set to 500 RPMs, was told by the dealer that this is normal for emissions and better fuel mileage and if I was to re program the idle to 1000 like every other car this issue would go away. Feb 19, 2013 · low idle issue. 3 4x4 non flex fuel with 140k on it. 2020-2021 6. Hi all. When I come to a stop the engine will initially sit at 600 rpm and then after about 10-20 seconds after being stopped the rpms will drop to 500 but on the idle down to 500 it’s very rough getting to 500 , it will actually clear up after getting to 500 Sep 24, 2010 · I talked to a few guys last night and these symptoms may be the result of a bad fuel pressure regulator. I did have that issue and the dealer did a fluid/filter change and flash which made all those issues of the shutter and vibration go away. 3L has started idling really rough and making a strange surfer smell from the exhaust. Average repair cost is $3,270 at 55,250 miles. KPayne99 and Citifieldtcny4. May 14, 2010 · Purchased a 2004 Chevy Silverado 1500 (reg. 2L V8 (93,000 miles) A couple of days ago I was driving down the interstate and noticed the engine started running rough. I just put in some Mobil 1 Synthetic as " my " first official oil change for the car. And 64PSI engine at idle while at temp. 3 once it gets hot at idle in park or drive the rpms fluctuate and the engine thuds while it happens, not a vibration or a shake but like a slap with each fluctuation on the needle. All I did then, was clean the throttle body with throttle body cleaner and that was that, never came up again for a few years until now. 5" turbo back exhaust. I have a 2004 sierra 5. 73 w/positraction. I let my dad test drive it and he must have pushed it past the edge as it starts knocking and blowing out white smoke. Come to a stop and the motor will shake. • Possible DTCS P0171, P0174, or P0300. K&N cold air intake. #1 · Jun 12, 2014. This immediately followed an oil service and the emissions recall (DPF temp issue). 34 % of the time it's the. That said, I noticed that now and then I feel a slight vibration while idling Mar 15, 2024 · I would associate the vibration at 70 to a bad u joint, a high speed vibration, but it wouldn't go away with throttle modulation. Since you've had it apart, then go back over all the fasteners and make sure they are tight to specs. I had bought other replacement sensors like wheel position , etc and when the GM tech reset my fuel composition, it went from calculating at 55% fuel alcohol with stabilitrak issues, rough 1-2 shifting etc. However the exhaust seems to be louder now. The desired RPM is based on sensor inputs and the actual engine RPM. a GM tech explained it was because they make them idle blowtorch lean to pass emissions. Jan 9, 2014 · The only remedy for this is to change the u-joint. #10 · Jan 24, 2019. 9. Sep 8, 2019 · An engine misfire is the most common cause of a shaking idle, and as the engine stumbles and misfires, it should be noticeable on the tachometer as a drop in RPM. As a side note, these trucks do not idle well at 500 RPM. Sometimes it would go back to normal and other times I had to shut the truck off and restart it to make it stop. and coming to a stop Feb 8, 2024 · you didnt write mileage, so well guess since its an 2005 its got 150k or more. 1st time posting here. 4M posts 185. 0 %. Cleaned MAF using a MAF cleaner. #1 · Oct 14, 2023. #1 · Jul 19, 2014. Let me start off by saying this is not the known transmission vibration with these trucks. After reading dozens of forums with multiple ideas I went with the cheapest/easiest first. 3 Idle speed question. May 25, 2022 · Noticed a slight shake at idle (particularly noticeable in gear at a stoplight). It spent most of it's life in New York, so, yeah, fairly rusty underneath. Let it idle in park, again shaky motor. 3 Z71 4x4 SLE quad cab 175k miles. A tune will cure this if you are out of warranty or don't mind voiding it. I ask because today while I was parked and truck on it felt like a mini-shake. Spark plugs are also a common culprit, especially if they haven’t been changed in a long time. The most common reasons a GMC Sierra 1500 has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. I also forgot that occasionally between 55 and 65 mph it stutters and loses power and shakes. The engine idling perfect. Jul 18, 2017 · The GMC Sierra is also report to have shaking issues at highway speeds. That might bump the oil pressure gauge up a bit at idle. I need help with my duramax. 3L V8 developed the same rough idle on start-up so many others have reported. Nov 25, 2016 · It's not so much lopey, but the whole truck shakes and cylinder 7 is reading -3. 3 V8 with the 6 speed tranny. 0 is just not going to happen. No shaking, fuel trims reset back to less than 2. It is usually on the left side of the engine on the fuel rail. Oct 23, 2013 · 790 posts · Joined 2011. Figure 3. Hello, This past week, my truck went into engine power is reduced mode and the truck started shaking pretty rough. Oct 23, 2019 · I have a 2007 Sierra with rough idle. In my case at least. 2L. The most common cause is worn spark plugs, followed by faulty coil packs. So, bought this truck in June, new, and noticed shortly after that it has a rough idle and only at idle. After 7 attempts to the dealer says it's runs normal now. Replaced: coolant temp sensor, tps, map sensor, fuel filter, and o2 sensor. Lower the engine. First start truck rattle noise underneath truck, sounds like it is possibly coming from exhaust. Aug 7, 2023 · Misfiring. Power seemed to be ok while driving to my next errand. Appearently a swiss watch idle out an untouched 6. Dec 26, 2023 · My 2022 has around 4000 miles on it. 0 long term. Jan 26, 2013 · Idle speed 590 to 610. 6 posts · Joined 2012. when driving the truck it runs great as it ever has with no feeling of any misfires. #1 · May 3, 2023. Cap Aug 29, 2016 · Don't feel a $40,000 truck should run like this but we haven't found a solution. Mine would run and idle fine then at random it would idle at around 1000 rpm. Oct 20, 2023 · Been struggling for a few weeks with a P0300 on my 2005 GMC Sierra 1500 5. You may want to get the combo MAF cleaner and throttle body cleaner and check your throttle body for gunk too. You may see the check engine light on and codes P0300 or P030X (where the X represents the misfiring cylinder number. Worn cam bearings do exactly what you describe. For vehicles with a 3:08 with a one-piece steel shaft, this can be replaced with a one-piece aluminum one that is utilized on all 3:42 and 3:73 ratios (K15543 and K15753 Models only). Runs smooth as silk now! Hope it works for y’all. 3 flex (vin Z code) engine starts idles at 700+, 800 but when you put it in gear D or R the idle drops below 500 stutters and the guages … read more. my 08 that i had with the 5. So, it's time for service and I get them to check it out again. When I am stopped or idling the the enigine will start idling very rough for a second or two and then stop. The last year or so, when the truck is cold and I turn it on (oil level is good), the oil pressure goes up as it should but then as the engine idle slowly drops, so does the oil pressure and it drops so low that the gague reads almost 0 and the Apr 16, 2020 · Is your car shaking or vibrating while at a stop? Watch this video to learn the main causes and how to diagnose and fix them. Circuit Description. ive noticed now that i can "feel" the truck idle now, kinda like a slight shake every second or 2, and it happens in either park or drive. "Quality Parts and Service at an Unbeatable Price" . #2 · Mar 29, 2012. The actual OEM ones, not the 3rd party set being rebadged. Install old engine mount to frame bolts. My truck is a very low mileage 2020 (just turned 5k). You won't hear or see the thud but keep in mind it's perfectly timed with the Jul 19, 2014 · 4 posts · Joined 2014. I have replaced plugs, wires, coils, and O2 sensors. Engine misfiring is the number one reason why your Yukon would be shaking when stopped. #1 · Mar 15, 2011. 3 was a little rough idle when in gear and stopped at a red light etc. Oct 1, 2014 · My 2013 6. I'm attaching a video of the tachometer when it happens. Rail pressure is much higher between 600 and 2k depending on throttle application. #6 · Mar 21, 2023. 300,000 MILES. Condition/Concern: 99 through 05 GEN III truck engines may experience any of the following: • A cold rough idle that diminishes as the engine warms up. Remove filter from fuel lines. I also got a code for a misfire (P0300). No trouble codes and the rough idle only lasted a few seconds. #7 · Oct 27, 2013. You get a rough and shaky motor plus a Check Engine Light. It idles in neutral or park at around 600 rpm. 2500hd 6. Jerry. Engine Timing. I recently bought a 2017 GMC Sierra 1500 Denali with the 6. put a sticker over the oil spi guage and only worry when the engine makes noise. 15 % of the time it's the. Boss plow. 3. Mar 6, 2021 · Maybe try running a bunch of fuel injector cleaner in the gas. 6L 403 CID L5P #PIP5711A Duramax warm engine idle knock noise. Today (May 14th) I did the following: * Cleaned MAF Sensor and Throttle Body. The V8 medication I feel like it's about to stall. 8 and -3. Am I supposed to know let my truck sit idle for an extended period of time? I do remote start it to warm up, but that’s only 10-minutes then it shuts off. A misfiring engine is one of the most common reasons your Sierra will shake when accelerating. Short term stays around +- 5% long term is a bit lower. Characteristic noise being amplified by the transmission bell housing. 5. I use 93 octane fuel Truck has 10k on it Fuel trims at 1500 RPM are near zero. 8. Good morning all, I purchased a 2017 Suburban a few months ago and am having a terrible time with the rough idle when the car is in drive and stopped at a red light. And when I'm sitting idling it starts to idle rough and shake the truck. If it is an older model, it’ll have a distributor and coil instead of coil Jan 18, 2021 · Lb7 shake at idle. In the end the Engineer stats "if I am not happy with the fix the May 30, 2022 · 2011 GMC Sierra 1500 5. If it's the original battery the jarring could have shorted a cell, causing these problems. The valve would stick open and pump exhaust into the intake killing the engine. It used to idle at 600, and fluctuate to 450ish every 5 seconds or so. I have a 2005 GMC Sierrra V8 5. Oct 29, 2021 · My truck has a rough idle/bad vibration when idling , especially in drive and reverse . The truck would crank but would not start. Like a few others, purchased brand new $65k+ Sierra 1500 Ultimate Denali with extremely annoying and frustrating vibration at idle, regardless of engine temperature and Mar 29, 2012 · johndeere9203. Dec 1, 2023 · I am also concerned the excess carbon could build up around the valves causing additional problems down the road after the warranty expires. Jump to Latest Follow Chevy Silverado and GMC Sierra Forum. Jan 23, 2020 · 2003 tahoe 5. The best I can describe it is its like the engine is on the verge of stalling and catches itself. 1. 39,000 miles. Mar 19, 2012 · 2011 Silverado 5. Feb 14, 2015 · Hello. Inspect it and replace if necessary. She looks great on the inside and out. swathdiver and RedSLEd. 3L very recently developed a new issue. i had a similar issue, the truck would stall/low idle randomly it was caused by a sticky egr valve. However, it was my experience with my 2007 GMC Sierra 1500 SLE. it is common for tunes to include raising the idle rpm up by 50-100 to address minor vibration/shake at idle. In any event, disconnect the battery for 10 minutes and see if everything resets after you do some investigation. Click Here To Order The Best Canned Carburator Cleaner: https:// Feb 21, 2023 · 3. EFI Live V2 w/dsp5 MAX EFFORT by Idaho Rob, EGT's Never higher than 1150* :thumb. I've noticed that when idling in park or at a stop light, I can feel slight vibrations or shutters in the door panel and seat back. 0% to -2. 3L V6 does have a counter-rotating balance shaft it's located above the camshaft in the lifter valley and driven off the cam. Fast forward 2 weeks and it's getting worse. 7K members Since 2009 A forum community dedicated to Mar 14, 2012 · 2000 Silverado 5. Apr 13, 2014 · 2006 GMC Sierra 2500 HD SLT ECLB, LBZ, LED tailights, black turn signals , black aftermarket headlights,265/75/16s uniroyal larados,Bilstein shocks,Banks 4inch exhaust, Nicktane adp, with a 3 micron Donaldson fuel filter, Schaffer's oil, pcv Re-route from alligator performance, Nicktane race plug, GM cab light,Banks 3 inch boost tube,And S&B air intake good to be driving a diesel again. We are fixing a sputtering dying rough idle engine on a 2012 gmc terrain 2. went to dealer twice. Bought a can of throttle body cleaner and took off the throttle body Sep 1, 2021 · It doesn't take much to screw with the electronics in these trucks. #1 ·Sep 6, 2018. Mar 24, 2016 · 49 posts · Joined 2014. This new issue came after i did a burn out from stop when testing my new tune. GMC dealer can not fix the issue. '13 SLE 4x4 ExtCab 5. It’s a 2003 GMC Sierra 2500hd. Feb 5, 2023 · At 2. Could also be an air leak in the intake (loose clamp, gasket) or maybe even a MAF sensor. I suspected the flash update but dismissed it because it isn't throwing any codes. 1020 posts · Joined 2011. If I feather the gas just to maintain that speed, when I go to reapply the gas pedal its a slight vibration. 10. Now I’m not too sure. Sep 2, 2022 · It seems to get significantly worse when the gas tank is near empty, but that may just be me or there is less mass there to absorb vibration. It seems to run fine, except for a misfire/engine shake Aug 11, 2016 · My 2016 GMC Serria 1500 has a rough "shake" idle while stopped. 7 liters, it's big for a 4-cylinder, which only adds to vibrations you might feel, despite it having balance shafts to offset those pulses. 3 v8, 168,xxx miles) the tach will shoot up to 1,000 then gradually fall (over about 1 minute) to 450-500 and stay there and be very rough because it wants to shut off. 3 flex fuel, AFM, 4x4 only idles at 500 rpm in drive whether or not the a/c is on. although it neither shut off, nor has it given me trouble starting (even on Jun 15, 2017 · 2017 Suburban Rough Idle. 3L Vortec. 055). 0 idles SLIGHTLY rough, if you aren't paying very close attention to it you won't notice it. Jul 28, 2020 · Vehicle Speed: A Misfire can be felt at any speed, but is most noticeable at low RPM. At 75+ it changed to a more violent shake/wobble. Locate the fuel filter along the frame of the truck (driver's side). 0 76k miles. Putting this in as a placeholder; I'm not broken down, but starting the truck up after stopping for lunch, it started idling very rough. Webasto moonroof, Lew tune, Michelin Defender LTX, 2" level. It will idle down to around 500 rpms then it will have something almost like a skip and the rpms will bounce very slighty and it causes a little "shake" in the whole vehicle. Aug 26, 2017 · Weird shake when at idle. Apr 7, 2018 · This has been known to throw codes, by the oil contaminating the MAF down stream. The wires may need cleaned or may be broken. 6 Duramax,Crewcab,LTZ,4x4,Projector Head Lights, LED Taillights, PPE Diff Cover& trans Sep 7, 2021 · Exhaust rattle noise. I have a 24 Denali HD. #1 · Feb 11, 2010 (Edited) 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. Four circuits are used in order to control the IAC valve, allowing a precise amount of air into the intake manifold. Under acceleration everything is great and normal. When it would die, the idle would drop to 4-500 and Dec 1, 2017 · Jul 22, 2015. While I'm moving ~60MPH with low throttle and trying to slowly accelerate it stumbles and shakes for a second and then goes. 42 G80 Z82 Z60 Fire Red. However when I attempt to maintain a constant speed of between 30 - 44 mph. 5 mm thick between the engine mount and frame at position 5 and 6. 3- 30,000 miles. So, I watched the trims, O2 Sensor data, maf intake reading. No codes Fuel pressure at idle is between 20 and 40 psi Nov 8, 2023 · Several fuel system issues in a GMC Sierra can lead to rough idle without triggering the check engine light: Clogged Fuel Injectors. I have an 05 Silverado 5. I test drove about 3 of these trucks before buying mine. , Dayton, OH, US. Mar 13, 2010 · The following diagnosis might be helpful if the vehicle exhibits the symptom (s) described in this PI. Jun 13, 2024 · I have a 2002 GMC Sierra with the 5. The vibration will be felt at the floor board and can be either a small vibration or a large one depending on the wear. Not a strong shaking. 8L, no frills), with 97,400 miles on it, on the 5th of this month. 2001 GMC Sierra 2500HD, CC,SB. My 2011 Silverado 5. Apr 1, 2014 · Bought new (used) 1012 Silverado and it has a rough idle when not moving. It will run normal on occasion but only lasts about 45 seconds or so. It doesn’t happen every time the truck comes to idle, but it does more often then not. 2011 Chevrolet Silverado Z71 5. - William M. I have a surging idle all the time nearly / rough idle especially when first starting the vehicle after sitting a bit; while occurring Rpm's fluctuates between 500-800 mostly but sometimes however can reach 1000-1100 on the high end of of the rpm oscillation and from what I've noticed from times I paid close attention to it, after rough idle, stalling, loss of power. In order to May 27, 2013 · Yes, the 4. Yesterday while driving home, the truck would stall at stop lights but would fire up and run fine until the next stop light. This noise has no short or long term effects on the engine. #9 · Jul 23, 2012. The dealer mysteriously could not find it, until I brought it back and spoke loud enough and what do you know, they felt it. 3 Liter. Jan 11, 2012 · vibrations at idle. Bad Spark Plugs. Jun 1, 2018 · Vibration - shutter. Vacuum Leak. 2008 Silverado 2500HD,6. I captured a couple of logs, etc, and will review when I get home. :thumb Dec 17, 2010 · Hello, I am curious where to start. * Replaced all Spark Plugs with Autolite Double Platinum copper-core APP5245s (they came gapped at 0. Once in FL I had the tires rebalanced, the 60 below speed was smoother but the 70+ unchanged. Stop the engine, hooked back up the brake booster and it goes right back to high fuel trims and rough idling. Most in-tank pumps are either working or they're not, they do not usually have a pressure problem intermittently. Nov 14, 2019 · Thumping or knocking noise coming from what sounds like the rear of the engine. Only last about 30 seconds then fades away completely. Fuel pressure is 57 PSI key on engine off. GM started to install balance shafts back in 1992 in some 4. The repair guys at 2 dealerships said this is normal and that GM has a new design of engine mounts to absorb the vibration so you won't feel it. Over time, spark plugs naturally become contaminated. Apr 29, 2015 · And I would characterize the rough idle almost as a misfire on one cylinder. I have since disconnected the battery for over 2 hours and reset the ECM & it has been running rough & stalling & RPM's fluctuating but tonight was the first time the CEL has come back on while driving & the Service Stabilitrak/TC came on while idling at a red light on the way home. Sep 10, 2021 · GMC Yukon ENGINE Rough Idle - FIXED How to Clean The Throttle Body to get a Stable Idle. 3 a-miss at idle. Get a tuner and bump your idle up to 650 rpm in drive and in neutral. Nov 22, 2015 · This truck seems to be doing that now. If I applied a bit of gas it would stop. If the tachometer is rock steady, and the shaking seems worse out of gear than in gear, it indicates a bad motor mount. . Sep 7, 2018 · 2005 1500 Z71 5. May 3, 2023 · 34 posts · Joined 2023. At 26K miles my 2016 Sierra 1500 started a mild vibration that could be felt in the steering wheel and seat on occasion. SOLD. 21 % of the time it's the. The 2016 GMC Sierra 1500 has 5 problems reported for rough idle. Change the fuel filter on the frame rail first, more likely to be bad. Click Here: Lincoln Diesel Specialties . When driving my 2011 GMC Sierra 5. Average failure mileage is 18,000 miles. Check carefully all over the engine for any vacuum leaks. Several other goodies. 17" Fuel boost wheels. When fuel injectors become clogged or dirty, they may not deliver fuel effectively, disrupting the air-fuel mixture required for proper engine operation. 4l 4 cylinder engine. 11. I started rolling coal one day (stock truck) and with the already hazy exhaust smoke, I knew that I had dropped an injector. 6 and you could not feel it idle at all. 3 v8. down to 3% and it settled out all the other codes leaving me with a brake Jul 13, 2020 · Rough Idle and oil weight. they said it is probably fuel related b\c of the "winter mix" of fuel. 2004 GMC 2500HD with the LB7. Friends, I am desperate, I tried everything I know and more but I cannot find a solution to my Loping idle and surging acceleration on my '90 Sierra C1500, 5. 9 for balance rates. 2015, 1500, Z71, Crew Cab, 6'4" Bed. #1. (if I remember correctly) Even went to an even-firing order to try and smooth out the engine some more. Lifted the hood and can feel the same type vibration on the intake tube going to the air filter from . 2017 GMC Sierra 1500. Good Evening Chevy and GMC owners, I just bought a 2000 Chevy Silverado 1500 4x4 with 142k on it. Yesterday while driving in the hot AF Florida summer, I noticed that while at stop lights, there was a very slight shaking going on. Causes a low pitch hum in the cab. Feb 27, 2019 · My 2013 Silverado with the 5. Then I p Jun 13, 2024 · I have a 2002 GMC Sierra with the 5. Shifting to park or neutral would stop it, but while in gear there was a slight shake, almost as if a cylinder was missing. it will do this every 20- seconds or so Sep 5, 2018 · 5 posts · Joined 2018. Sometimes the truck would start normally but then die, then start right up again normally and run and idle fine. Bought new. Clean the throttle body with a TB cleaner. Sign 2: Vibrations in the floor board while the vehicle is moving is another sign that should not be ignored and could possibly be the u-joint. 2014 GMC Sierra 6. the engine is old, it need new cam bearings. I recently replaced all 8 fuel injectors, and immediately after starting the truck with the new injectors, the engine runs really rough. If you quickly place the truck in drive or reverse in that 30 seconds, the rattle disappears, but as soon as you put in back in park or neutral the rattle Feb 11, 2010 · 106 posts · Joined 2007. Let us take a look at both the GMC recommendations as well as the private owner’s personal experiences to identify some of the most common root causes of a shaking GMC Sierra. 25,800 miles. ($8 at Walmart) Beachbourbon. Hooked up Torque pro, and everything seems ok. Asked by dragonflyoffshore Nov 27, 2012 at 11:42 AM about the 1995 GMC Sierra 1500 K1500 SL 4WD Extended Cab Stepside SB. The typical GMC Sierra, if properly maintained, can easily last up to 200,00 miles, with some reaching even 250,000 or 300,000 Mar 21, 2023 · 1913 posts · Joined 2015. My last truck was a Ram 3. When it is cold, and I first start it, it will go to around 1200 rpm, then start dropping. 3 that has a slight "shake" or rough idle when warmed up and sitting still. I pulled off an exit and at idle the engine died and I was unable to get the engine started again. Click here: LB7 Injector replacement instructions . whenever i start my truck (2002 silverado 1500 5. They showed me a bulletin that there is no fix and it is prevalent on other models with this Feb 20, 2017 · 19999 posts · Joined 2012. i never noticed it in my truck, but it is not uncommon from what i hear. Nov 20, 2017 · I increased my idle by 100 rpm in neutral and drive on my '13. It’s happened before while stationary, but I just figured it was cause it’s older. Other owners of GM’s trucks on the GMT- K2 platform — model year 2014 and newer Chevy Silverado and GMC Sierra Nov 11, 2012 · Lincoln Diesel Specialties. Like. When I'm going down the interstate and set cruise at 70-75 and V4 kicks in it sounds like a ricer with a coffee can almost. 3L's and became standerd for the '95 model year. Oct 31, 2015 · 29 posts · Joined 2008. Took it to the dealership and of course they couldn't duplicate it. Currently: 2002 Yukon XL 2500 4x4 w/ 8. PIP5140: Low Speed Vibration 30-35 mph (48-56 km/h). 3 6sp 3. Jun 26, 2015 · The reason why the engine will idle rough is because it's not getting as much fuel as it needs to idle and maintain the necessary engine revs. Final note- when stopped at a light and idling roughly, shifting into neutral stops it. i pulled out 1 plug on each bank (they are original) and they Nov 12, 2018 · 2017 Silverado weird vibration. Apr 9, 2013 · 2012 5. This happens when the truck is cold or warm. Jun 2, 2012 · stumble at idle but not a dead miss. Once I accelerate past idle the truck runs fine. Lifted 4" on 35" Toyo M/T. #10 · Feb 20, 2017. It only did it occasionally, and was just barely noticable. Oct 14, 2023 · 9 posts · Joined 2019. A vehicle’s ignition system consists of spark plugs, coil packs, and maybe plug wires. 3L V8 2WD Auto with 247,000 Miles. 3L with 190K, always changed my own oil, never had an overhaul or any deep work done. If I put the pedal down it will down shift and be just fine. The control module controls idle speed with an idle air control (IAC) valve. Nov 24, 2018 · 12911 posts · Joined 2015. 1 liter 496 ci, 4L85e, 3. I started by removing the MAF sensor a cleaning it. ok, been getting worse and started before i did fuel and air filter; in nuetral idleing it isn't to bad but in gear and idleing its getting worse, you can mainly hear it in the cab, feel it in the steering wheels and pedals, and as soon as you give it any kinda fuel pedal it goes perfectly normal,. The 2013 GMC Sierra 1500 has 1 problems reported for severe shaking; beyond idle- to point of engine failing. If there is fuel in the vacume line that attaches to it then it could be bad. Now I know better. it runs great down the highway. It never has idled rough when in park or neutral. You can unplug the valve and see if that fixes your problem. Aug 5, 2020 · I have pulled the valve covers off both sides & all 16 lifters are ok. This is intermittent, it will go from shaking to smooth. Its got 20 psi at idle, thats good for another 100k miles. Spark Plugs. Idle is stable, wide open throttle is stable, all other regimes does not seem to exibit any issues. Inspect the transmission output shaft bushing for irregular wear. Dec 9, 2016 · Brand new ACDelco plug wires. Another thing to check is the mass airflow sensor. Sounds like what my 2001 did when my tps (throttle position sensor) went bad. Or call us 920-361-7700 . Low Idle (Not a Rough Idle, or Hard Start); I have searched for an answer to this but every search leads me to a rough idle and hard starting problem. Sounds better, runs better, and holds about 35 to 38 psi oil pressure at idle when hot (in drive). #14 · Mar 26, 2016. Sent from my iPhone using Tapatalk. Torque the bolts to specifications to validate if the vibration returns: • If idle vibration could be turned off with Nov 21, 2009 · Sounds like you have an issue with the IAC. 4. 7L TBI, I've replaced the Timing Chain & Gears, IAC valve, TPS, MAP, EGR & Solenoid, ES Module & Knock Sensor, ECS, Ignition Module, Plugs & Wires, Dist. Dec 1, 2017. Josh, the budget mechanic Hawaii, shares his tips and tricks on rough Jul 22, 2012 · 687 posts · Joined 2012. Look for any wires that might be shorting or arcing (best done at night when dark). and you can run 87 that is all i ever ran in mine. Not sure if I dont have enough press Mar 15, 2011 · 41 posts · Joined 2011. #1 · Oct 31, 2015. There is also 1990 GMC C1500. 2017 GMC Sierra. All 3 trucks had around 50K miles on them and all seem to idle about the same. And it shakes pretty bad, but seems to go away once V8 kicks back in. Fuel trims at 1500 RPM are near zero. Vocational, Technical or Tra 13,108 satisfied customers. This can result in rough idling. Jun 12, 2014 · W. 2,724. The engine light is off. 3 started to get a rough idle around 40K miles it was hit a miss did not do it all the time. 208k miles. ran codes, misfire graph and showed nothing. The only thing that I noticed on my 2011 Silverado 5. injection a sometimes rough idle are Silverado and GMC Sierra Nov 30, 2023 · My 2005 Silverado 1500 5. Aug 23, 2014 · 2014 Silverado 2WT, 3K miles, has been vibrating, shaking, clunking, rough at idle, since day 1. My GMC Sierra shakes while it is idling. Service consultant. But never does. If idle vibration was significantly reduced, add a spacer washer (3) approximately 2. I've checked and gapped the plugs, did a visual Sep 28, 2018 · Was having problems with rough idling and surging rpms. 2002 silverado 1500 5. cab, 8 foot bed, 4. San Diego, CA. This recent issue actually started with a rough idle and a P0307 (misfire on cylinder 7). however no solution and still idles rough. When a spark plug stops operating, the cylinder it’s connected to can misfire. they also mentioned they had been seeing this in the V8 engines. There is a very violent shaking that you can feel sitting inside the truck, and it idles around 450-475 RPMs, which is way lower than the usual 600-650 RPMs. jy pf to eh pz ee mv pp cg fu