Gmc acadia shudder when accelerating

When driving around 60mph there is a shake that can be felt in the steering wheel. It gets worse when accelerating; you can take your hands off the wheel and watch it shake a good couple degrees. The problem seems to be on the driver's side as you can feel it the most there, on the passenger side its much less pronounced.

This 2010 GMC Acadia has a vibration and noise above 45 miles per hour. Let's fix that! Also bonus footage with a special guest. Merch: http://watchweswork.c...My 2012 Enclave, with 117,000 miles, started to shudder intermittently during slight acceleration or when climbing a grade. It did not shudder when under constant speed on level terrain or downhill. After reading responses to this issue in this forum, I first attacked the easier task of changing spark plugs.Apr 29, 2022 ... THIS IS WHY YOU HAVE TRANSMISSION SHUDDER VIBRATIONS ON A CAR If you have automatic transmission that has shudder or vibrations when the ...Find the location of the MAF sensor in your Acadia, unplug the electrical connectors, and remove the sensor from the housing. Spray at least 10 spurts of MAF cleaner onto the sensor and then let it air dry for an hour or until completely dry. Do not use cloth or cotton swabs to clean the sensor, as it can damage it.Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO). Mexico and Export Regions should follow Bulletin 19-NA-018. Brand: Model: Model Year: Date Breakpoint: Engine:If you’re in the market for a spacious and reliable SUV, the GMC Acadia is likely on your radar. And while buying a brand new vehicle can be exciting, it’s important to consider al...At last, if you encounter a noise when accelerating with your GMC Acadia and this noise which could be a cliking sound tends to reduce when you disengage (press the clutch pedal), then one of the wear parts of your clutch system may be the cause. Indeed, the clutch release bearings must be swapped almost every 120 000 / 130 000km.

I have a 2015 GMC Sierra 1500 5.3 with the 6l80. ... But the shake when slowing down to about 20 and then accelerating is still there. It doesn't do it in tow haul I'm not sure what changes in tow haul mode. ... If the truck is lugging at low rpm's, it could be causing a slightly lean condition, which will cause a shudder. GM is notorious for ...Post subject: Shudder/vibration at launch acceleration. Posted: Tue Mar 10, 2015 10:30 pm . LE Member: ... 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH1 post · Joined 2023. #6 · Jan 30, 2023. Hello- My 2015 Acadia developed a shudder or skipping sensation from the rear wheels, primarily when turning left or right. GMC dealer diagnosed this as needing a rear differential clutch at a cost of 3200.00. 2800 for the part (??!!) and 400 for labor.Incubator vs accelerator: find out the valuable resources and support they offer as you start your business and thrive in competitive markets Incubators and accelerators play an in...2 posts · Joined 2015. #1 · Nov 12, 2015. Hi new poster here. My wife's 2008 Acadias power steering pump has always made a whine noise. More so when turning the wheel. It has gradually gotten worse/louder and more noticeable even when not turning the wheel. Then when you first started driving it when it was cold yet and turning at low speeds ...1 post · Joined 2023. #6 · Jan 30, 2023. Hello- My 2015 Acadia developed a shudder or skipping sensation from the rear wheels, primarily when turning left or right. GMC dealer diagnosed this as needing a rear differential clutch at a cost of 3200.00. 2800 for the part (??!!) and 400 for labor.Here is one comment: i am drive ability tech for gm... gmc/buick dealership. the gm plugs come pregapped . you are using aftermarket plugs in your acadia . in my experience that motor does not like after market plugs or coils. just had to change coils and plugs on a 10 acadia thursday due to a misfire underload at highway speed and the owner ...

Here is one comment: i am drive ability tech for gm... gmc/buick dealership. the gm plugs come pregapped . you are using aftermarket plugs in your acadia . in my experience that motor does not like after market plugs or coils. just had to change coils and plugs on a 10 acadia thursday due to a misfire underload at highway speed and the …Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East ... GMC Canyon 2017 2019 March 1, 2019 LGZ M5T Sierra Models 2015 2018 EOP L83, L86, L8B M5U, M5X Yukon ModelsYet another "newer" car that already has a drivetrain problem before 100k miles.This 2017 Chevy Traverse surges and SHUDDERS under load when the torque conve...Feb 23, 2020 · I have a 2014 GMC acadia with 96,000. I started chasing a shudder that occurred during acceleration, usually between 25-40 MPH, about 2 months ago. Goodyear told me it was due to a bad upper control arm and tires. So they replaced the tires and control arm for $1100 and it didn’t fix the shudder. The power steering pump went the next week (which I’m sure wasn’t related but was another ... drowell47 Discussion starter. 1 post · Joined 2019. #1 · Jul 28, 2019. Just purchased my wife a 2019 GMC Acadia. Vehicle has about 800 miles on it and I notice a whining noise when accelerating. This only occurs when the A/C is in the on position. Sounds like a compressor bearing. Will have to take in to the dealer for a diagnosis.Jan 23, 2014 · 95 posts · Joined 2013. #1 · Jan 23, 2014. I have transmission vibration/shudder when the transmission shifts to a higher gear and RPM drops to 1500. This is happening mostly when going uphill. I need to keep pressing the accelerator and rising the RPM to stop this vibration/shudder.

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First, a little background: NEW 114 miles: We bought a new 2014 Acadia, SLT2 FWD in November of 2014. This thing is loaded; double moon roof, tow pkg, rear DVD heated/cooled/memory seats the whole 9. The ideas was to get my wife into a nice, new car as we hoped it would last for years to come as we planned to grow our family (we are expecting ...The alternator in your GMC Safari is responsible for charging your vehicle's battery and providing a constant, reliable source of power for your Safari's electrical components. Whe...I have a 2012 Acadia Denali that was experiencing the same issue rpm fluctuation under load. Thinking it was a gas/air mixture issue I tried swapping coils, spark plugs, cleaning gas tank, and cleaning the throttle body. It helped, but did not resolve the issue. There were no engine lights so I had nothing to go on.1. Erratic shifting. One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop.1755 posts · Joined 2010. #7 · May 19, 2021. Years ago I owned an Acura MDX that had a vibration on slow speed left turns. The dealer said new rear differential at $3,000. My independent mechanic said there was a Tech Bulletin that said change the fluid. $64 later and a fluid change and the problem was solved. George.1. Erratic shifting. One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop.

2017 Acadia Denali Shudders & High Pitch Whines. We purchased a 2017 Acadia Denali and put 4000 miles on it so far. It has been in the service department 3 times because of a constant shudder/miss at speeds 25-50. Anytime trying to hold a steady speed at those levels it shudders and feels like the engine is missing.Jun 29, 2018 ... In addition to slight vibration on acceleration, there is vibration when breaking hard at highway speeds. It's not the rotors.Most of the time, you’ll feel it when it engages. Service StabiliTrak Warning: Your Acadia’s “Service StabiliTrak” warning light is the number one indication that something is wrong. Cruise Control : If one of the wheel speed sensors is not working correctly, your Acadia may lose cruise control. Traction Control Not Working: Your …#engine #diagnoseissue #fixed #tips #advice #repair #partsfailedHow To Fix a Shuddering Transmission. Fortunately, fixing a shuddering transmission is often as simple as getting a transmission flush to replace the contaminated transmission fluid with clean, fresh fluid. If the cause of your shuddering transmission is low fluid rather than contaminated transmission fluid, you may just need to fill up your ...I have a VF Calais V 2014. It has developed this slight shudder when driving – but only when I accelerate – between 50-80 kph. No noises when idling or starting. No shudder/vibration on cruise at higher speeds. It is not a constant thing – only when I have to regain speed – and only a short time – 10/20 seconds ?okay waiting We tried flushing the transmission and it helped a little. Don't shudder as bad as bsfore. Auto Mechanic: David Craig. Ok, the torque converter clutch is the issue. Try another fluid flush. If it doesn't help more, then the TCC will need to be replaced.1. Misfire. Vehicle Speed: A Misfire can be felt at any speed, but is most noticeable at low RPM. A misfiring engine is one of the most common reasons your Terrain will shake when accelerating. A vehicle’s ignition system consists of spark plugs, coil packs, and maybe plug wires.RPMs drop and jerking while accelerating. hello everyone,i have GMC acadia 2008 and it has 200,00 kilometers . it drops RPMS from 2500 to 1500 at the speed of 40 to 50 miles/hour while accelerating... starting and initial running has no problem, but after reaching ( i guess 5 and 6th gear ) if i take the foot off the Accelerator pedal ,and ...

I’m getting a shudder/stutter when accelerating above 45mph. When I give it throttle above 45mph and it down shifts and puts the RPMs at 2,000, the shudder/stutter starts until 2,500 RPMs and then goes away. No issues under 45mph, during steady state driving, and it happen less when in tow haul mode. Running stock tune.

Just bought a 2012 GMC Acadia with117k on it. Mint condition cosmetically and seemed to drive fine until yesterday. It seems when I'm doing about 40 mph or 60 mph the RPMs drop between 1700 and 2100 and I get the shudder/buck. If I let off the gas or accelerate it powers through but when at steady speeds in traffic it gives those issues.Vibrations. One of the most noticeable symptoms of transmission shudder is the vibration that can be felt throughout the vehicle. This isn’t your regular road vibration; …Cooke Discussion starter. Yes it is an AWD and it has 119000 miles,the noise happened 1 time about 4 weeks ago and didn't do it again for about 3 weeks and now it does it daily when you turn and slight acceleration there's a clunk in the rear end you can feel through the floor board,I removed the tire and everything seems to be tight and in ...95 posts · Joined 2013. #1 · Jan 23, 2014. I have transmission vibration/shudder when the transmission shifts to a higher gear and RPM drops to 1500. This is happening mostly when going uphill. I need to keep pressing the accelerator and rising the RPM to stop this vibration/shudder.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Here is one comment: i am drive ability tech for gm... gmc/buick dealership. the gm plugs come pregapped . you are using aftermarket plugs in your acadia . in my experience that motor does not like after market plugs or coils. just had to change coils and plugs on a 10 acadia thursday due to a misfire underload at highway speed and the …Remove and install used transfer case". 1-When driving straight, and with mild acceleration, there is some shuddering, seems to be from front of car. Intermittent, most of the time it isn't present. 2-When driving straight, there is a small sound a vibration, similar to going over some mild rumble strips.Chris I have a 2015 Acadia Denali that seems to shudder at around 30 MPH and again around 40 when just driving around town it doesn't happen when accelerating hard. no check engine light. Mechanic's Assistant: Do you notice any knocking noises or a burning smell while accelerating? NoSome of us may have a known issue going on with our vehicles that is a cause of concern and simply irritating. Chevrolet, GMC shudder or shaking when your driving down the road at a steady or slight acceleration. This usually happens around 25 to 80 miles per hour. What is it? Several things could be the cause like tire balance or wheel balance.Vehicle Shudder Problems of GMC Acadia. GMC Acadia owners have reported 20 problems related to vehicle shudder (under the power train category). The …

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Important: If either shudder condition or slip control observed to be normal than do not proceed with ATF Inspection/Change or Torque Converter Replacement. 6325131 • The fluid should be red or brown. • The fluid should be transparent so that objects or writing can be seen through it. Sample #1 is an example of acceptable fluid. Sample #2 is an1 post · Joined 2022. #8 · Jan 25, 2022. I have a 2019 GMC Acadia that is experiencing the exact same whistling sound also on like acceleration, 25-40mph. Nothing at idle. I had the transmission checked out and no issues found there. I was wondering if it is the luggage rack on top that I hear. 2019 GMC Acadia.On my 2012 Avalanche with 5.3l and 6-speed AT, I experience an intermittent shudder between 1,000 and 1.500 rpms. I sometimes notice it in lower gears at low speeds, and it happens on the highway for a couple seconds at a time pretty regularly if I'm cruising around 1,500 rpms. If I drop to 5th gear and get to around 2,000 rpms, the …A Particle Accelerator - A particle accelerator works very much like the picture tube found in a television set. Learn about the basics of a particle accelerator. Advertisement Did...If your Acadia’s engine appears to be working extra hard to get you moving, that indicates the parking brake is stuck. It could also mean that one of your vehicle’s brakes is stuck. This happens when there’s a crimped brake line, bad caliper (disk brakes), or faulty wheel cylinder (drums). When this happens, your Acadia may pull to the ... Important: If either shudder condition or slip control observed to be normal than do not proceed with ATF Inspection/Change or Torque Converter Replacement. 6325131 • The fluid should be red or brown. • The fluid should be transparent so that objects or writing can be seen through it. Sample #1 is an example of acceptable fluid. Sample #2 is an Torque converter shudder causes a brief shake or vibration in your Acadia when internal clutches apply. Understanding the role of torque converters helps …2014 GMC Acadia with shudder around 50-65mph. Hesitation upon acceleration. 192,000 miles on it. Shop said the “think” - Answered by a verified GMC Mechanic. ... However, upon accelerating sometimes it misses and feels no fuel is getting engine or transmission missing . I've taken care of it but am concerned.Apr 28, 2022 · Transmission Shudder at Startup Could Point to Torque Converter Problems for the 2015 GMC Acadia In 2020, a driver reported to Acadia Forum an issue with his 2015 model shuddering at startup . According to his report, the shuddering continues until he hits around 25 miles per hour. 2012 GMC Acadia. Asked by acadiadenali12 in Apopka, FL on February 26, 2015. It acts like a dirty or clogged fuel filter or a slip in the tranny. The check engine light is not coming on and there is no codes available. Took to a dealer and they stated nothing is wrong with vehicle...they suggested to clean the injectors.2008 gmc Acadia shudders under acceleration usually at speeds below 60. It doesn’t happen every time I accelerate, but - Answered by a verified GMC Mechanic ... I have a 08 Gmc Acadia that gives off misfire like symptoms when accelerating. The codes i pulled were p0752, p0420, p0700. ... the car experienced a slight shudder in the …Here is one comment: i am drive ability tech for gm... gmc/buick dealership. the gm plugs come pregapped . you are using aftermarket plugs in your acadia . in my experience that motor does not like after market plugs or coils. just had to change coils and plugs on a 10 acadia thursday due to a misfire underload at highway speed and the … ….

Jul 28, 2020 · 1. Misfire. Vehicle Speed: A Misfire can be felt at any speed, but is most noticeable at low RPM. A misfiring engine is one of the most common reasons your Terrain will shake when accelerating. A vehicle’s ignition system consists of spark plugs, coil packs, and maybe plug wires. A Particle Accelerator - A particle accelerator works very much like the picture tube found in a television set. Learn about the basics of a particle accelerator. Advertisement Did...For every Airbnb, Dropbox, Stripe, or Twitch, there are hundreds of others that fade into oblivion. Y Combinator is an accelerator that hosts what are widely considered the most co...The Acadia has 195,000 miles contemplated cutting my losses and purchase a new vehicle. Then a few days ago the transmission started slipping and shuttering. Had a local transmission shop diagnose and they quoted me $2800 to rebuild both the torque converter and transmission.Problem Description. A shudder or vibration may develop while driving at speeds between 35 and 40 MPH. Our technicians tell us this condition is commonly caused by a failed automatic transmission torque converter. It is recommend to replace the torque converter and install an updated powertrain control module (PCM) to correct this concern.Bulletin No.: 20-NA-227. GM bulletins are intended for use by professional technicians, NOTa "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools ...Here is one comment: i am drive ability tech for gm... gmc/buick dealership. the gm plugs come pregapped . you are using aftermarket plugs in your acadia . in my experience that motor does not like after market plugs or coils. just had to change coils and plugs on a 10 acadia thursday due to a misfire underload at highway speed and the …GMC Acadia 2014 2018 M7V, M7X Terrain 2017 M7U, M7W Involved Region or Country North America and N.A. Export Regions Condition Some customers may comment that the vehicle may have a severe launch shudder in 1st gear from a stop, or while driving along when in 4th gear, or during the 2-3 upshift or 3-2 downshift.My 2017 Premiere (180,000 miles) has a terrible shudder on acceleration but it doesn't do it all of the time. I was driving up to NY from FL and my check engine light came on and it threw 4 codes (P0174, P0171, P0442, P0496) for the purge solenoid valve, so I changed that when I got to NY. It is now giving me p0138 code. Gmc acadia shudder when accelerating, drowell47 Discussion starter. 1 post · Joined 2019. #1 · Jul 28, 2019. Just purchased my wife a 2019 GMC Acadia. Vehicle has about 800 miles on it and I notice a whining noise when accelerating. This only occurs when the A/C is in the on position. Sounds like a compressor bearing. Will have to take in to the dealer for a diagnosis., Just picked up our 19 Redline from the dealership. Had the snow tires done as well as the shudder checked. Road test confirmed the issue. TCM update as well as fluid flush as per bulletin 18-NA-091. There was also another code on the invoice. 18YN31866297. Mileage at service is 36618 Kilometres. Hopefully this is all that is needed., Nov 5, 2017 ... may need CVs or driveshafts I get a crazy shudder/wobble sensation at certain speeds during acceleration. It weird cant really explain it ..., Hesitation during GMC Acadia acceleration AS A RESULT OF THE ACCELERATOR CABLE: Another possible justification why you feel hesitation during GMC Acadia acceleration, whether you are driving, stationary, hot, cold or accelerating, is that your throttle cable is seriously worn.If your accelerator cable is in a serious state of …, Feb 11, 2019 ... The dealer informed me there was a new transmission fix for the automatic 8 speed transmission with the shudder problem during light ..., Shudder seems to correspond to acceleration but also seems to occur right before car shifts into 2nd and 3rd gear. Doesn't seem to shudder at highe... 2007 GMC Acadia - My 2007 GMC Acadia shudders or vibrates when I accelerate., Shuddering. This is a relatively common torque converter issue that often results in vibration, usually before or after the clutch lockup of the torque converter. If you own an older automatic vehicle, you may notice this vibration when driving at 40 to 50 MPH, which is when lockup occurs., This 2010 GMC Acadia has a vibration and noise above 45 miles per hour. Let's fix that! Also bonus footage with a special guest. Merch: http://watchweswork.c..., 2014 GMC Acadia with shudder around 50-65mph. Hesitation upon acceleration. 192,000 miles on it. Shop said the “think” - Answered by a verified GMC Mechanic. ... However, upon accelerating sometimes it misses and feels no fuel is getting engine or transmission missing . I've taken care of it but am concerned., Hesitation during GMC Acadia acceleration AS A RESULT OF THE ACCELERATOR CABLE: Another possible justification why you feel hesitation during GMC Acadia acceleration, whether you are driving, stationary, hot, cold or accelerating, is that your throttle cable is seriously worn.If your accelerator cable is in a serious state of …, 1 post · Joined 2009. #1 · May 12, 2009. I have a 2007 SLT. We recently went on a trip and the check engine light came on. My husband was driving and after the light came on, we were having problems taking off after a traffic light. He would press the accelerator and the engine would rev up like it was in neutral and the car would not move ..., Gmc Acadia Shudder When Accelerating. 2016 gmc acadia sle1 parts 2017 gmc acadia limited awd 4dr features and specs. 18 Mar 2024. Gmc acadia gets styling, powertrain updates Acadia gmc dvd intellilink usb while gm Autogator acadia gmc sle1. Need help in finding these part(s) | GMC Acadia Forum, My problem presents itself when I'm accelerating at lower speeds, let off the gas a little and then re-accelerate. The transmission feels like it slips momentarily and then re-engages with a sudden jolt/clunk. Some important things to know are that the 3-5-R waveplate was replaced preemptively 5 years ago (before it could ever go bad)., 1. Misfire. Vehicle Speed: A Misfire can be felt at any speed, but is most noticeable at low RPM. A misfiring engine is one of the most common reasons your Terrain will shake when accelerating. A vehicle’s ignition system consists of spark plugs, coil packs, and maybe plug wires., Jun 29, 2018 ... In addition to slight vibration on acceleration, there is vibration when breaking hard at highway speeds. It's not the rotors., , 1 post · Joined 2019. #1 · Feb 21, 2019 (Edited by Moderator) I have a 2012 Acadia SLT and we have been experiencing some engine shudder around 1200-1800 RPM at speeds from 30-45mph. I have taken it to my mechanic once and he changed 6 spark plugs and #3 coil. We picked it about a week ago and it still had the issue going on., Jul 13, 2021 · Chris I have a 2015 Acadia Denali that seems to shudder at around 30 MPH and again around 40 when just driving around town it doesn't happen when accelerating hard. no check engine light. Mechanic's Assistant: Do you notice any knocking noises or a burning smell while accelerating? No , A sputtering engine can indicate a number of problems. If your GMC Acadia has a sputter, it is most likely going to be caused by bad fuel system, ignition system, MAF sensor, or bad catalytic converter. Your Acadia’s engine is a giant pump. It pulls in air (where it is measured by the mass airflow sensor)., Incubator vs accelerator: find out the valuable resources and support they offer as you start your business and thrive in competitive markets Incubators and accelerators play an in..., August 22, 2022 by John. If your GMC Acadia is shuddering when you accelerate, it’s likely due to a problem with the torque converter. The torque converter is what transfers power from the engine to the transmission, and if it’s not working properly, it can cause all sorts of problems. Fortunately, there are a few things you can do to try ..., Transmission Shudder at Startup Could Point to Torque Converter Problems for the 2015 GMC Acadia In 2020, a driver reported to Acadia Forum an issue with his 2015 model shuddering at startup . According to his report, the shuddering continues until he hits around 25 miles per hour., The alternator in your GMC Safari is responsible for charging your vehicle's battery and providing a constant, reliable source of power for your Safari's electrical components. Whe..., Nov 8, 2018 · Our trusty Acadia has around 140k miles. Recently, it started doing a slight shutter/shim when accelerating. It is in the front of the car on the passenger side. I've read that it could be the transmission, could be the front line drive bolts. We had the transmission fluid flushed/changed recently. It is still dark. , drowell47 Discussion starter. 1 post · Joined 2019. #1 · Jul 28, 2019. Just purchased my wife a 2019 GMC Acadia. Vehicle has about 800 miles on it and I notice a whining noise when accelerating. This only occurs when the A/C is in the on position. Sounds like a compressor bearing. Will have to take in to the dealer for a diagnosis., 2012 GMC Acadia. Asked by acadiadenali12 in Apopka, FL on February 26, 2015. It acts like a dirty or clogged fuel filter or a slip in the tranny. The check engine light is not coming on and there is no codes available. Took to a dealer and they stated nothing is wrong with vehicle...they suggested to clean the injectors., Chris I have a 2015 Acadia Denali that seems to shudder at around 30 MPH and again around 40 when just driving around town it doesn't happen when accelerating hard. no check engine light. Mechanic's Assistant: Do you notice any knocking noises or a burning smell while accelerating? No, gig229. 208 posts · Joined 2007. #4 · May 23, 2013. The hissing noise is a refrigerant leak in the AC system. Your dealer will need to run a leak test on all the connections, hoses, and both evaporators to determine where the leak is. But I will tell you that on my 09 Enclave, both the front and rear evaporators had to be replaced as they ..., 1 post · Joined 2019. #1 · Feb 21, 2019 (Edited by Moderator) I have a 2012 Acadia SLT and we have been experiencing some engine shudder around 1200-1800 RPM at speeds from 30-45mph. I have taken it to my mechanic once and he changed 6 spark plugs and #3 coil. We picked it about a week ago and it still had the issue going on., The 2013 GMC Acadia has 22 NHTSA complaints for the power train at 69,524 miles average. ... Shudder in transmission. ... went bad within 5 years and had to be replaced due to the engine shutting ..., Common symptoms of a stretched timing chain in the Acadia include: Rattling from the engine. Check engine light. Car shakes or vibrates excessively. Misfires. Engine shuts down, stalling. Rough idle. On CarComplaints.com, engine failures caused by timing chain problems were reported up until the 2012 model year., You may be able to hear these sounds through the floorboard, and you might feel a slight vibration near your feet. This sound will usually be louder with the windows down. — #1. Bad Catalytic Converter. The first issue that causes a rattling noise underneath your vehicle is a bad catalytic converter., Dustin, when accelerating the air is sucked into the TB through the air filter, MAF and the air box. Check for any obstructions/dirt in any of these areas and while in there clean the MAF too with MAF cleaner. Check all vacuum hoses for pin hole leaks too. Could also be wind noise from door/window seals too. 2002 Silverado LS Ext cab long bed 5 ...