2020 silverado torque converter problems

Oct 21, 2022 · Following that, you should have both the torque converter and the clutches inspected by professionals. If there are signs of excessive wear on the components, then they need to be replaced in order to keep the truck driveable. Noise. If the transmission of a 2014 Silverado sounds like it is about to break, then it almost certainly is.

2020 silverado torque converter problems. No 1st or 4th gear (in Drive it shifts from 2nd to 3rd and locks the torque converter): Shift "A" solenoid has failed. Wiring problem from the PCM to the transmission. No 1st or 4th gear (torque converter doesn't lock, can be driven in 2nd, 3rd, and Reverse gear): Transmission is in "limp home" mode or lost electrical power.

Recall date. 2020-10-22. Recall no. 20V650000. General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 and 2020 Chevrolet Silverado 2500 trucks. One of ...

problem and is not caused by the torque converter clutch (TCC). Vehicles that are presented with TCC shudder should have the appropriate fluid exchange procedure completed. Diagnosis beyond the customer compliant is not required if vehicle was built prior to production dates indicated above. Special Tools DT-52263 Transmission Fluid Exchange Kit:Silverado 1500 (New Model) 2019 2019 SOP March 01, 2019 L3B, L84 MQE GMC Sierra 1500 ... (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), then the vibration root cause is NOT TCC Shudder. GDS can be used to monitor TCC Slip to confirm TCC Shudder. Once TCC shudder is duplicated TCC slipIf your 2019 Chevy Silverado has transmission problems, or other problems that can’t be fixed, or has been out of service 30+ days, you may be entitled to a cash refund, new vehicle or lemon law buyback.. If you think your 2019 Chevy Silverado is a lemon, call our GA Lemon Lawyers at 404-737-3451 now for a FREE case review.My understanding is the torque converter is typically what fails and then the metal gets in the transmission and trashes it as ... My 2020 with an 8L90E is getting a new TC after less than 20K easy miles. ... It's easy to start freaking out when you see so many people come forward with the same problem. However, ...GM, which represents the owners of various GM vehicles who have one of two models of eight-speed automatic transmissions — the GM 8L90 or 8L45 — made between 2015 and March 1, 2019. The ...Just some kind of weird transmission problems that happen randomly. Most of the time it runs great, but hearing clunks in the transmission is never somethin...9 Automatic Transmission Torque Converter problem of the 1997 Chevrolet Suburban. Failure Date: 12/23/2003. The torque converter clutch relay in the transmission overheated, causing excessive pressure, which caused the transmission fluid to push the dip stick up out of the dipstick tube. Then the transmission fluid escaped.

16 Jan 2021 ... Links For Items Used: Torque Converter: https://a.co/d/aI7Uajh Transmission Filter: ...Page 2 July, 2020 Bulletin No.: 20-NA-136 3. PIP5697B – DTC P0747 Setting At Engine Start-Up When The Transmission Is In Park 4. PIP5720 – 2020 GF9 9T45/50/60/65 Transmission Fluid Leak 5. Torque converter shudder. • PIE0570 – Engineering Information - Torque Converter Clutch (TCC) Shudder Occurring On Light Throttle Acceleration 2-6 GearsTorque converter clutch problem. Okay so i have these codes, fairly important codes, and im sure the torque converter and clutch itself is fine but i think the solenoids are the cause for the code, my question is, it says the TCC PWM solenoidnis bad, but for the life of me i cannot find one for sale anywhere, on any parts stores, does itngo by ...A judge granted class-action status to the lawsuit representing 39 plaintiffs across 26 states. Drivers of the Chevy Silverado and other GM vehicles report transmission hesitation, shaking, shuddering, clunking, and hard shifts upon changing gears. Vehicle models in the lawsuit include:Problem #1 - The Torque Converter Similar to the GM transmission, the OEM torque converter is very unreliable as a result of it's non-flat friction surface and embarrassing stator assembly. ... My 2020 Ford Ranger …The cost to replace a transmission in a 2015 Silverado 1500 truck can vary significantly depending on the type of transmission, the labor costs, and the parts needed. It is estimated that replacing a standard automatic transmission will cost around $3,000-$4,000 while replacing an all-wheel drive or 4WD transmission could run anywhere from ...24291284 Torque Converter - Direct Fit, Sold individually. Part Number: AC24291284. Vehicle Info Required to Guarantee Fit. $397.49. + $120.00 Refundable Core Charge. Add to Cart. Product Details. Warranty : 24-months or unlimited mile AC Delco limited warranty Quantity Sold : Sold individually Prop 65 Warning :Replacing the torque converter involves several steps: Step 1: The old torque converter and other components are removed. Step 2: The new torque converter’s seal is inspected. Then, the converter is flushed with automatic transmission fluid (ATF). Step 3: The pump gear, stator splines, and turbine splines are checked if they’re engaging.

Jun 22, 2022 · Silverado and Sierra HD automatic torque converter weaknesses. 2022 Chevy Silverado 3500 HD | Chevrolet. The main issue plaguing the Allison 10-speed is the torque converter, according to NextGen Diesel. Or more specifically, the lockup mechanism. Ford’s version, which has proven superior, has a lockup mechanism that faces the stator. 2015 through 2019 model year Chevrolet Silverado; 2017-19 Chevrolet Colorado; ... 2019, through model year 2022, when GM replaced the automatic transmission fluid that caused the shudder problem.Damaged Torque Converter Seals. As you may have guessed by the name, the torque converter seal is what keeps all the transmission fluid within the transmission. If this fluid were to leak, the transmission’s rotation would be impacted and potentially lead to slippage, the engine overheating, or other problems. Over time, the torque converter ...Windows: Here’s the problem: The HEIF image format, which Apple now uses in iOS 11 in the form of HEIC files, is a great alternative to JPEG. HEIC images eat up less space and supp...RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.need help, 4l60e torque converter lockup problem. I have a 1998 S10 2.2 two wheel drive with a code that won't go away. The truck just turned 80,000 miles and the service engine light went on with code p1860 TCC PWM circuit. No blown fuses found. The code would reset and come back within about 5 seconds after the engine was restarted.

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Page 4 April, 2020 Bulletin No.: 19-NA-121 7. Place the hose (3) in the GE-47716-2 Graduated Measuring Bucket, utilizing a Spring Clamp to retain the hose. 3723844 8. Remove the level set plug (1) from the transmission. Important: DO NOT over tighten the DT-51190 as it can be damaged by excessive torque.DO NOTexceed 9Y (80 lb in). 9. the pickup is a 2011 chevy silverado 2500 HD LT model auto with 6.0 engine gas. thanks for any input. today in extreme 100 degree weather, my truck now is bumping like a slip in transmission. this happens in every gear and when i accelerate and it gives a bumping feel like the torque converter is trying to stay and match gears. ive got a feeling its torque converter. is this transmission ...The 2020 Chevrolet Silverado 1500 lasts around 250,000 miles with some average check engine light and transmission issues reported. At $29,998 to $57,000, it's a decent value for a large truck with great towing and hauling capabilities. 4.48. Owner Reviews. 157.There are many reasons a transmission may not shift into gear, and we've listed five common ones on this page. We'll start by taking a look at an issue that can affect both manual and automatic transmissions before going into more depth on common problems for both kinds. 1. Degraded Transmission Fluid. Transmission fluid is vital to the proper ... problem and is not caused by the torque converter clutch (TCC). Vehicles that are presented with TCC shudder should have the appropriate fluid exchange procedure completed. Diagnosis beyond the customer compliant is not required if vehicle was built prior to production dates indicated above. Special Tools DT-52263 Transmission Fluid Exchange Kit: Angiotensin-converting enzyme (ACE) inhibitors are medicines. They treat heart, blood vessel, and kidney problems. Angiotensin-converting enzyme (ACE) inhibitors are medicines. The...

RPM fluctuation and transmission rumble. I "think" this is a tranny or torque converter issue, but maybe not. 2011 Silverado crewcab, 5.3L, 4wd, 6 speed auto. Quick back story: A week ago I had a spot on the freeway I slowed down to about 60 and when I sped back up (not enough throttle to downshift) my truck was jumping and dropping 100 …Well here I am 6 months into the truck and it jerks, seems like a transmission problem. - Moises M. , Moreno Valley, US. Maximize. The 2019 Chevrolet Silverado 1500 has 5 problems reported for ...Bad Torque Converter Symptoms: Chevy Silverado. Here are some of the most common bad torque converter symptoms that could happen to your Silverado. 1. Slipping Transmission (Low Speed) The torque converter "stall speed" is the speed that the engine needs to be turning before the torque converter will begin engaging the transmission.24 Jul 2023 ... Just got done replacing the torque converter on our 17' Chevy pickup. Transmission started acting weird and I got online and found out this ...The 2020 Chevrolet Silverado 1500 has 47 NHTSA complaints for the engine at 7,661 miles average. ... Complaints are spread across multiple & redundant categories, & are not organized by problem.So many video file formats, so many handheld video players, so many online video sites, and so little time. To have your favorite clips how you want them—whether that's on your DVR...Productivity goes right out the window, however, when your transmission has problems with shifting smoothly. A new Chevrolet Silverado torque converter from AutoZone can help you get your pickup back in gear. ... 2021 Chevrolet Silverado 1500 Transmission Torque Converter; 2020 Chevrolet Silverado 1500 Transmission Torque Converter;Other Name: Converter Asm,Torque (Remanufacture) (310Mm) ; Converter, Transmission Converter. $446.54 MSRP: $706.00. You Save: $ 259.46 ( 37%) Check the fit. Add to Cart. Fits the following Vehicles: 2005-2007 Chevrolet Silverado | 1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB SHORT BOX, 1500 ...Causes of Torque Converter Problems: Chevy Camaro. There are many different things that can cause your Camaro to have torque converter problems. Here are the most common ones. 1. Low or Dirty Transmission Fluid. Transmission fluid is the lifeblood of the transmission and the torque converter bolted to it. If there isn't enough it can't do ...2020 GMC 2500HD Torque Converter Issues. I have a 2020 GMC Denali 2500HD (diesel) which has around 9600 miles. Last week I noticed some small spots in my garage, so I crawled underneath and found transmission fluid leaking. i called my local GM dealer and got it in. They said that it was a torque converter seal and they had the part ordered and ...

Recall date. 2020-10-22. Recall no. 20V650000. General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 and 2020 Chevrolet Silverado 2500 trucks. One of ...

Silverado 1500. 78,000 miles. The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving at 30 MPH, the vehicle briefly vibrated and shuddered before losing motive power. After tapping the brake pedal and rapidly accelerating, the vehicle continued to vibrate and shudder but eventually returned to normal functionality. March 31, 2020. Email Share. 6L80, 6L90 Transmission Tech Advisory: Consider an Updated Converter in Your Next Rebuild. We all know that …9 Automatic Transmission Torque Converter problem of the 1997 Chevrolet Suburban. Failure Date: 12/23/2003. The torque converter clutch relay in the transmission overheated, causing excessive pressure, which caused the transmission fluid to push the dip stick up out of the dipstick tube. Then the transmission fluid escaped.Excessive oil consumption is one of the biggest issues of the second generation Chevy Silverado 1500. This problem only affects trucks equipped with the 5.3-liter V8 and is more ... “I have a 2020 Silverado Custom 2.7 turbo with the 8 ... some owners have also had to get their torque converters and other transmission parts …The cost to replace a transmission in a 2015 Silverado 1500 truck can vary significantly depending on the type of transmission, the labor costs, and the parts needed. It is estimated that replacing a standard automatic transmission will cost around $3,000-$4,000 while replacing an all-wheel drive or 4WD transmission could run anywhere from ...This is a complete overview and analysis of the problems that plague the new 2020 and above 10-Speed Allison Transmission found in the new Heavy Duty DuraMax diesel trucks! ... the Allison 10 Speed 10L1000 was released for the 2020 model year in General Motors heavy duty Silverado and Sierra trucks and is currently in use today. This ...Read about common problems with the engine including AFM, HPFP, injector failure, and more. ... The 2.7L L3B turbo engine debuted in 2019 as the base engine in Chevrolet Silverado 1500 and GMC Sierra. ... 60 percent worn. At 62k the fuel pump housing had a rust hole in it and I had an evap leak. A week later the tourqe converter started ...Blazedude Discussion starter. 411 posts · Joined 2016. #1 · Jan 26, 2021. I just had my original torque converter replaced due to cracked welds. I was also making a fan roaring noise above 1500rpm. No shutter just noise and leaking. What is with gm and their poor torque converter quality. I was at 54000 miles.Jan 18, 2024 · A. Ahmadoasf14 Discussion starter. 6 posts · Joined 2024. #1 · Jan 18, 2024. 2015 gmc Sierra 1500, 5.3 4x4, 210k miles. My transmission was replaced at 160k, but recently truck vibrates around 1200 rpms only in v4 mode, I plugged in a range and that went away, in v4 mode tcc slip reached 6-700 on highway cruising speeds. My temps also reach ...

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The 8L90 transmission is still in use today, but is slowly retiring in exchange for the 10L80 and 10L90 transmissions. Without further ado, we will now assess the prolific problems associated with this transmission and how to address and enhance them. Problem #1 - The Torque Converter. As with many transmissions, the torque converter suffers ...A Torque Converter Clutch (TCC) regulator valve is inside the valve body. It can become worn out with time and cause harsh shifting from 1st to 2nd gear. ... Common transmission problems in the Chevrolet Silverado include slipping gears, rough shifting, delayed engagement, and fluid leaks. Various factors, including worn clutch plates, damaged ...Bulletin No.: 18-NA-358. Released November 30, 2018 March 11, 2019 – Corrected Acadia and Enclave Transmission RPOs. October 17, 2019 – Added the 2019 Model Year to the Impala and Acadia models and updated the Involved Region or Country section. February 28, 2020 – Added the 2018 and 2019 Model Year and Transmission RPO MHM to the XTS.The assembly defect then prevents the transmission cooler from working properly- causing performance issues. So, if your brand new 2021 Chevrolet Silverado, GMC Sierra, Chevy Tahoe / Suburban, GMC Yukon, or Cadillac Escalade isn't shifting quite right and only has a few miles on the odometer, this problem may be to blame. The good news is ...Well here I am 6 months into the truck and it jerks, seems like a transmission problem. - Moises M. , Moreno Valley, US. Maximize. The 2019 Chevrolet Silverado 1500 has 5 problems reported for ...For starters, the torque converter costs between $150 to $350. Therefore, if you are currently experiencing any of the symptoms of torque converter problems, you may need a good idea of how much it'll cost to get it fixed or replaced. If you plan on fixing it yourself, then you'll spend around $150 to $500. On the contrary, taking the ...Bulletin No.: 18-NA-358. Released November 30, 2018 March 11, 2019 - Corrected Acadia and Enclave Transmission RPOs. October 17, 2019 - Added the 2019 Model Year to the Impala and Acadia models and updated the Involved Region or Country section. February 28, 2020 - Added the 2018 and 2019 Model Year and Transmission RPO MHM to the XTS.Dec 3, 2020 · 2020 -2021 Cadillac XT5 ... As you probably know it was the fluid that caused 90% of the issues and a flush with the correct new fluid fixed most problems. Some had torque converter issues but ... ….

4l60e bad torque converter. Hey guys I just partially finished a build I have been working on. I built a heads cam 5.3 built the rear diff and paid another local guy to rebuild the Trans. I had about 200 miles on the Trans build and the torque converter was acting kinda odd. Anyways last night in driving it and in rolling about 25 and I punch ...Its a random problem which doesn't happen every time I plug in. Screen will indicate no trailers are presently hooked up ... (2020 Chevrolet Silverado 1500 RST 5.3-L V8) ... torque converter, ...The torque converter doesn't slip, the transmission does. The 6L80/90 is plagued by two major issues: A. The torque converter (namely the plate the lock up clutch is bonded to inside of the converter) is prone to fail (lockup clutch plate flexes with heat cycles and miles…and creates fine metal shrapnel that is suspended in the fluid) and ...Received 7 Likes on 2 Posts. Do I call it Torque converter shudder? So I bought a used 2016 F150 XLT 5.0 4x4. About 94k on it. Drove it on a 1400 round trip to PA and noticed a little RPM "flutter" at low speed just 100-200rpm when 5th-6th gear at 1000-1700rpm. Then I noticed the intermittent "rumble strip" feeling on the freeway.The torque converter drains overnight and that’s why you get the hard 1-2 shift. ... 2017 Chevy Silverado same problem I had the torque converter and all fluids changed at the dealership I ...1 Automatic Transmission Torque Converter problem of the 2017 Chevrolet Silverado 1500. Failure Date: 07/20/2022. The contact owns a 2017 Chevrolet Silverado 1500. The contact stated that while driving at an undisclosed speed, the brakes made grinding noises due to the brake pads rubbing on the rotors. The contact added oil to the brake pads ...Angiotensin-converting enzyme (ACE) inhibitors are medicines. They treat heart, blood vessel, and kidney problems. Angiotensin-converting enzyme (ACE) inhibitors are medicines. The... A new Silverado transmission torque converter not only improves your truck's shifting, it also fixes transmission slippage and shuddering. Other signs of a malfunctioning torque converter include overheating, dirty transmission fluid and strange noises such as clicking and revving. Chevy Silverado 8L90 Torque Converter Replacement Timelapse. I decided to do a timelapse at work replacing a torque converter on a 2017 Silverado with the 8L... 2020 silverado torque converter problems, The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs., RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices., If you do not have an account but would like to check the status of an order, request a change, or report a problem with an order or shipment, please go to our Order Status & Returns page. Gift Certificates , A bad torque converter interferes with the transfer of power from the engine to the transmission of a vehicle. It causes transmission overheating, slipping and shuddering and poor ..., 2019 Chevrolet Silverado 1500 transmission problems with 29 complaints from Silverado 1500 owners. The worst complaints are slams into gear, jerks when shifting, and shudder/shake when accelerating., , If you do not have an account but would like to check the status of an order, request a change, or report a problem with an order or shipment, please go to our Order Status & Returns page. Gift Certificates, The 2014 Chevrolet Silverado 1500 has 1 NHTSA complaints for the power train:automatic transmission:torque converter at 112,000 miles average. CarComplaints.com : Car complaints, car problems and ..., One problem related to automatic transmission torque converter has been reported for the 2016 Chevrolet Traverse. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2016 Chevrolet Traverse based on all problems reported for the 2016 Traverse., Rpm surge bounce-----need some real help. Hi everyone, I got a 2010 5.3L w/6 speed w/66,000 miles. Recently it started having this "rpm bounce" , about 100-200 rpm when driving about 40-50mph. The rpms are low since the truck is in its 5th or 6th gear, typically around 1000-1500rpm., 6.6. The torque converter clutch (TCC) feel may not be noticeable. In many applications the TCC will apply after the 1-2 shift and TCC events will not be easily detected using …, Productivity goes right out the window, however, when your transmission has problems with shifting smoothly. A new Chevrolet Silverado torque converter from AutoZone can help you get your pickup back in gear. ... 2021 Chevrolet Silverado 1500 Transmission Torque Converter; 2020 Chevrolet Silverado 1500 Transmission Torque Converter;, August 15, 2017. Failing Component: Power Train:Automatic Transmission:Torque Converter. Summary: This preliminary information communication advises the technician that generation 5 engines with regular production option code l83, l86, or lv3 may have an oil consumption concern were one quart in 2000 miles is being used., Do you have red fluid (transmission fluid) leaking underneath the center of your car or truck? Very likely it is your converter seal in your automatic transm..., Fuel efficiency is not great at 15-18 (city)/19-24 (hwy). And some owners did complain about issues that certainly give us pause. Car Complaints had 648 complaints about the 2017 Silverado, with 75 specific to the transmission. Issues and complaints include hard shifts, hesitation, jerking, and clunking in low gears., 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., Jun 15, 2023 · June 18, 2023 by Jason. Your Chevy Silverado’s torque converter is responsible for connecting and disconnecting the engine from the transmission, transferring power smoothly. When this process fails, it can lead to torque converter shudder. Causes of shuddering can include worn torque converter clutches or the gradual application of the ... , Allison 1000 Transmission Problems [05 Problems and Solutions] Allison 1000 transmission has 5 common problems, including the torque converter, TCM module, shift selector shifting problem, limp mode, and installation issues. Some owners also reported valve body and water pump issues, which are rare. 1., As a reminder, the 3.0L I6 LM2 turbodiesel Duramax was introduced for the 2019 model year of the Silverado 1500 and Sierra 1500, and develops 277 horsepower and 460 pound-feet of torque. Meanwhile ..., The problem: certain 2020-2021 model-year Chevy Silverado HD and GMC Sierra HD trucks may have a condition in which the transmission oil cooler jumper line has a leak at the crimp., I've read 18-NA-177 and the older 16-NA-175 and now have found that an updated version of 16-NA-175 has this cryptic advice: Important: Do NOT replace the torque converter or transmission assembly for this condition. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder., - Problem #1 - The Torque Converter - Problem #2 - The Intermediate Shaft - Problem #3 - The Valve Body ... I recently purchased a 2020 Chevy 2500 HD with the 6l90 transmission. ... 31, 2022. Do you have any information on failures, surge, fishbite, chug, for the 6L90E transmissions in the 2022 Silverado HD2500, that also causes overheating ..., The 2015 Chevrolet Silverado 1500 has 24 problems reported for transmission shifts poorly. Average repair cost is $4,680 at 46,300 miles. (Page 1 of 2), Catalytic Converter. A C Compressor. Contact Us. locate a store. track your order. we're hiring! Equip cars, trucks & SUVs with 2020 Chevrolet Silverado 1500 Transmission Torque Converter from AutoZone. Get Yours Today! …, Specifically, the 18-NA-355 TSB addresses "torque converter clutch (TCC) shudder conditions" for the 8L45 and 8L90 eight-speed automatic transmission, RPO codes M5N, M5T, M5U and M5X. The ..., The common problems of Chevrolet Silverado’s recorded by are: Hard or rough shifting is a common transmission problem with the General motor’s Silverado. It makes the driving experience not so smooth. When you are experiencing a hard or rough shifting, it becomes hard to switch between gears. There is no smooth transition, and most times ..., A GM transmission lawsuit has been partly dismissed after five class actions were consolidated in a Michigan court, with GM owners alleging the Hydra-Matic 8L90 and 8L45 transmissions are defective., 2018 Chevrolet Silverado 1500 2dr Regular Cab 8ft bed. 355-horsepower 5.3L V8 6-speed shiftable automatic 4WD, part-time w/low range. Chevrolet Silverado 1500 in Nova Scotia, Canada. Oct 2020 - Jun 2022. Dec 2021., 12 Mar 2021 ... Comments165 · 2014 - 2019 Silverado & Sierra 6L80 Transmission Fluid & Filter Change - Easy Pan Removal! · 2014 Chevy Silverado Transmission&n..., bulletins pertaining to torque converter clutch shudder issues in two of their 8-Speed transmis - sions; 8L45 & the 8L90. This problem currently affects 11 different models across 3 different OEM manufacturers between the model years 2015 and 2019. GM's solution to this problem is lengthy & complicated, requiring 20 liters of ATF be flushed, I would be very interested to hear from any 3rd Gen owners who have had torque converter problems. ... -2012 Silverado LS 4.8 4WD EC-2011 Rogue SL AWD-2006 Accord Sedan EX-L K24 5MT ... Vehicle was ok until summer of 2020. Towing my 18' 3000lb RV on a cool night at 90km/h ..., P0703 is a diagnostic trouble code (DTC) for "Torque Converter/Brake Switch B Circuit Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic ..., As some of you know, my 2011 LT 5.3/6L80 suddenly started occasionally 'bucking', just like a random misfire. It ended up being the torque converter coming apart, and the only sign when dropping the pan was a film of aluminum 'dust' at the rear of the deepest part of the pan. The magnet had nothing more than normal fuzz on it.