Chevrolet car dealership, a part of General Motors.

Oil Consumption, Knocking, and Ticking in GM Engines

By: Michael H. Rosenstein, Esq.

General Motors is a multinational corporation and has been America’s largest automobile manufacturer for years. It was founded in 1908 and has now grown to be one of the world’s largest multinational corporation that is specialized in manufacturing, marketing and distributing vehicles and vehicle parts. Over the years, General Motors has built a core connection with several high-end automobile brands such as Cadillac, Buick, GMC and Chevrolet.  In spite of GM’s vast popularity over the last 100 years, it has managed to attract some unfortunate defects and widespread issues with oil consumption in GM engines. GM customers have complained for years of widespread, frustrating, and dangerous oil consumption issues.

If your GM vehicle has suffered any serious issues regarding oil consumption, CCA is here to help. We invite you to call our experts today for a free consultation: (833) LEMON-FIRM.

What Are the Common Safety Defects in GM Engines?

Vehicles with GM engines have been facing numerous lawsuits for the past couple of years involving excessive oil consumption. The engine issues have been brought up multiple times by owners of vehicles across different brands. Most of the complaints mention engine damage, ring wear, knocking engines, sudden stops and more.

One of the most common issues amongst vehicles with GM engines is a troubling “knocking sound” and “ticking noise”. Several models have received similar complaints and customers say, this is a persisting problem that does not seem to have an easy solution. In fact, oftentimes when presented to the dealership, the GM dealership advises customers that there’s nothing that they can do.  A user of Chevrolet Tahoe described the issue as, “I just bought my Chevy Tahoe and when I start it, it makes a knocking noise. This noise is very annoying and It seems like if it’s coming from the engine.  The noise comes and goes at frequent intervals.”

Several users have discussed the excessive cost of having a vehicle with high oil consumption. Apart from the cost of frequent oil refills, it incurs other expenses such as the costs of repairing damaged engines, pistons and rings. A user of Chevrolet Suburban stated, “Chevy Suburbans are too expensive to have these kinds of problems. I took the Suburban to the dealer and they told me the pistons and rings needed to be replaced to the tune of $4,000. They admitted to oil burning in the combustion chamber and a buildup of carbon had occurred. This vehicle is a perfect fit for our large family. However, given that GM gave me their dishonest run-around and then only paid for half of the repair, I will be selling the vehicle after it gets fixed and will NEVER buy another Suburban again.”

Here is a partial list of the recent models that are known to have oil consumption issues:

  • Chevrolet Avalanche
  • Chevrolet Silverado
  • Chevrolet Suburban
  • Chevrolet Tahoe
  • GMC Sierra
  • GMC Yukon
  • GMC Yukon XL

What Actions Have Been Taken to Address the Oil Consumption Issues, Ticking Noises, Knocking Noises, and Other Problems in GM Engines?

Multiple lawsuits have been filed against GM engines over the past 10 years. A recent class-action suit claims that engines fitted in GMC and Chevrolet vehicles are equipped with faulty engines that fail prematurely. The lawsuit alleges, the engines cause excessive oil consumption and spark plug degradation.

Another recent lawsuit filed in 2020, alleges the IV LC9 engines are equipped with defective piston rings that are incapable of maintaining enough tension to keep oil in the crankcase. As per the lawsuit, the engine consumes excessive amounts of oil which can cause severe engine damage.

What Can I Do if My GM Vehicle Has Oil Consumption Issues?

If you are facing any engine trouble with your GM vehicle such as excessive oil consumption, engine damage, knocking noises, ticking noises, damaged piston rings, sudden stops or other engine-related issues, California’s lemon laws are here to protect you from any further complications. Over the past few years, our lawyers have developed strong expertise in litigating cases surrounding complicated engine issues.

If you are facing any performance issues with your vehicle, do not hesitate to contact our experts for a free consultation at: (833) LEMON-FIRM.

Chevrolet dealership, trucks that may have transmission issues.

Transmission Defects in GMC Canyon and Chevrolet Colorado

By: Karina Dutra

Buying a new car is a big decision. You’ve finally found the vehicle that checks all the boxes and you’re ready to upgrade to a new ride. No one buys a new car expecting to deal with transmission defects only months after driving it off the lot, but owners of 2015-2017 GMC Canyon or Chevrolet Colorado have found this to be exactly the case. If you are experiencing manufacturer defects on your GM vehicle, we encourage you to contact the lemon law experts at CCA today for a free consultation: (833) LEMON-LAW.

GM’s Severe Transmission Defects

Owners of 2015-2017 GMC Canyons and Chevrolet Colorados have complained that they have experienced transmission issues when downshifting or accelerating. The most commonly reported issue is “shuddering” when the truck accelerates and sudden “jerking” when downshifting gears when driving up an incline. Despite many complaints about these serious issues, there are currently no ongoing investigations regarding transmission defects for these vehicles within GM.

Recent Class Action Suit

In a 2019 class action lawsuit, McKee v. General Motors, LLC, James McKee filed a complaint that GM “designed, manufactured, marketed, distributed, sold and warranted” models of 2015-2017 GMC Canyon and Chevrolet Colorado that were “equipped with defective 6L50 transmissions.” The defective transmissions allegedly caused the vehicles to “slip, buck, kick, jerk, and harshly engage” causing “premature internal wear… and eventually suffer a catastrophic failure.” 

Consumer complaints regarding the GL50 transmission are serious and widespread.  For example, one 2015 GMC Canyon owner complained, “Transmission and engine are not synchronized through shifting and acceleration. Engine is overloaded and shudders at low speeds when transmission does not downshift. Acceleration is very poor unless aggressive accelerator is used. Often, engine revs to 4500 to 5000 RPM but there is no acceleration until transmission catches up – dangerous situations occur.” Similarly, a 2015 Chevy Colorado owner complained, “I spent a ton of money for this truck. Seems as it does not know what gear to be in… It is by far the worst driving car / truck I have even owned.”  

If you have purchased or leased a new or used automobile that has manufacturer defects, California lemon law allows you to pursue a claim for a replacement vehicle or full refund. The attorneys at CCA are highly skilled and experienced at fighting manufacturers to ensure that your rights are being protected. If you are the owner of a vehicle and you are experiencing transmission issues that are putting your safety at risk, we invite you to contact us for a free consultation with an expert lemon law attorney at: (833) LEMON-LAW.

A Chevy car dealership.

Chevy Shake, Shake, SHAKE!

By Matthew Jordan

California has close to 400,000 miles of road, built for smooth cruising.  Indeed, Californians love their cars and love taking them on long, pleasurable, and smooth drives along our famous highways and byways.  However, unfortunately, some of General Motors’ (GM) recent releases have not been living up to consumers’ expectations for smooth driving.  Instead, many California car owners’ vehicles are plagued by the infamous “Chevy Shake.”  

The “Chevy Shake”

The “Chevy shake” is a disturbing vehicle defect, which results in extreme vibrations in the vehicle’s steering system, suspension, and vehicle as a whole at high speeds (65-80 mph).  Drivers describe the condition as a terrifying and uncontrollable vibration throughout the vehicle. As one 2014 GMC Sierra owner described, “I have the vibration also between 65-75mph. The passenger seat shakes like hell, the steering wheel has bad wobble.”  Similarly, the owner of a GMC Crew Cab 4×4 described the condition as, “a vibration at all speeds in the steering wheel, once reaching 70mph a seat vibration started to become really noticeable and extremely noticeable as speed increase past 70. In conjunction an audible noise inside the cab developed at 75 that sounding like a metal on metal vibration at a high frequency and the cab was much louder. Became really noticeable at 80 and beyond.”

Disturbingly, GM dealerships are unable to fix the customers’ issues.  Customers return multiple times for multiple repairs but are unable to obtain a resolution of their vehicles’ issues. For instance, one owner described, “My 2016 Z71 Crew Cab has shook from day one. Now has 9K on it. Third trip to dealer and I took service manager for a ride. He seen and felt it and stated my entire passenger side door was shaking also. Speed of 70 mph up.”  Unfortunately, many customers are told there is nothing wrong with their trucks, that they have to purchase new tires, or that GM simply doesn’t have a fix.  

A recent class-action lawsuit alleges that GM’s aluminum driveshafts are unable to withstand the pressure of highway speeds, and can deteriorate over time and eventually fail completely. These weak driveshafts create severe vibrations within the vehicle that cause drivers to lose control of their vehicles. Driveshafts are meant to carry torque from one or more components of a car to another component. For example, the back wheels of a car would not be able to rotate without a driveshaft carrying the torque that the car’s engine creates to the back of that car. The driveshaft, as one of the pivotal mechanical devices that makes a car run, is meant to be able to not just endure constant stress, but continue to perform at its highest capacity under this stress. The failure of a car’s driveshaft represents a fundamental failure for the car.

GM has allegedly been made aware of this dangerous issue with their driveshafts and continues to sell and lease the affected vehicles while suppressing information about the vibrations. To make matters worse, GM has allegedly been replacing broken aluminum driveshafts on their vehicles with the same defective driveshafts. One consumer even attempted to get repairs on three different occasions before a GM dealership told him that the vibration was “within the normal limits of road vibration.” The consumers that have replaced the aluminum driveshaft with a steel driveshaft experienced no more vibrations.

What Consumers Think

Some GMC drivers have spoken on the issue of vibration at high speeds. One said, “I was talked into buying their ridiculous extended warranty and yet they do nothing to fix the problem. This truck is a lemon,” while another said, “Nothing has been fixed. They can’t find what’s causing the issue. So now they have decided that there is nothing wrong with it. The GMC Sierra is supposed to vibrate.”

How We Can Help

If you currently drive one of the following cars, we encourage you to contact California Consumer Attorneys for a free consultation with an expert lemon law attorney:

  • 2015-2020 Cadillac Escalade
  • 2014-2019 Chevrolet Silverado
  • 2015-2020 Chevrolet Suburban
  • 2015-2020 Chevrolet Tahoe
  • 2014-2019 GMC Sierra
  • 2015-2020 GMC Yukon/Yukon XL

When you purchase a car in good faith, you deserve to receive a product that works both safely and efficiently. Our expect lemon law lawyers will make sure that you are well taken care of and fully compensated by GM.  Call us today for a free consultation: (833) LEMON-FIRM. discusses the issues in GMC/Chevrolet issues with ESC warning lights and braking systems.

GMC/Chevrolet Braking & ESC Warning Lights

By Sepehr Daghighian

Owners of GM vehicles, including Chevrolet Silverado 1500s, GMC Sierra 1500 Pickups, and Cadillac CT6 sedans are extensively complaining of trouble with their vehicle illuminating warning lights from the vehicle’s computer systems. GM vehicle owners, for example, have complained of warning messages from the Electronic Stability Control (“ESC”) system, Anti-Lock Braking System (“ABS”), “Check Engine” lights, and other warning messages. The warning messages are often accompanied by the vehicle being placed into a different driving mode, which affects braking, steering, and other systems.  These illuminated warning signals are more than just a mere annoyance – GM has recently announced a recall of over 814,000 vehicles due to defects in the vehicle’s electronics systems.  

According to documents filed by GM with the National Highway Transportation Safety Administration (“NHTSA”), in “certain 2019 model year Cadillac CT6, Chevrolet Silverado 1500, and GMC Sierra 1500… a software error can, in rare cases, disable the vehicle’s

electronic stability control (ESC) and antilock brake system (ABS) systems for a single ignition cycle.”  Also, in many vehicles, the battery cable rings were contaminated with glue residue during production. As a result, the electrical connections could become loose, “which could lead to an intermittent electrical connection or arcing… An intermittent electrical connection between the B+ battery cable and the alternator could cause the vehicle to stall. The intermittent connection could also lead to arcing, which could generate sufficient heat to damage surrounding material and increase the risk of a fire.”  

The vehicles affected by these recalls include:

  • 2019 – 2020 Chevrolet Silverado 1500 Trucks;
  • 2019 – 2020 GMC Sierra 1500 Trucks; and
  • 2019 Cadillac CT6 sedans;

GM vehicle owners have complained extensively about electrical issues arising from these defects.  For instance, frustrated truck owners have complained of multiple warning sounds/lights, while driving their relatively new vehicles.  Frighteningly, GM owners have received warning of their “brake failure” indicator while driving accompanying by irregularities in the braking system.  Oftentimes, the “brake failure” light is accompanied by several other warning lights, as well. Owners have furthermore complained that, in spite of multiple visits to the dealership, GM has been unable to remedy these problems.  

Recently, in December 2019, GM issued multiple recalls to address the electronics issues arising from these vehicles.  

The lemon law attorneys at CCA are experts at handling lemon law complaints against General Motors.  If your GM vehicle has not lived up to your expectations, has spent too much time in the shop, or has scared you with an array of flashing warning lights and sounds, we invite you to contact us for a free consultation today: (833) LEMON-FIRM. discusses the main issues with General Motors' 8-speed transmission.

GM’s Dangerously Defective Hydra-Matic 8L90 and 8L45 Transmissions

By Brian T. Murray, Esq.

If you are driving one of the hundreds of thousands of vehicles recently manufactured by General Motors, LLC (“GM”) you may be at risk due to a dangerously defective transmission.  Francis, et al v. General Motors, LLC, a class action recently filed in the United States District Court for the Eastern District of Michigan, alleges that the automotive giant was aware that thousands of vehicles manufactured between 2015 and 2019 contained defective transmissions, but did nothing to warn customers. The class includes customers in the United States who purchased or leased any vehicle equipped with GM’s Hydra-Matic 8L90 transmission or Hydra-Matic 8L45 Transmission.  

The alleged defective transmissions can cause unsafe conditions including but not limited to “suddenly lurching forward, sudden loss of forward propulsion, and significant delays in acceleration.”  “These transmissions have a common defect,” the complaint reads. “Drivers attempting to accelerate or decelerate their cars feel a hesitation, followed by a significant shake, shudder, jerk, clunk, or ‘hard shift’ when the vehicle’s automatic transmission changes gears.” The problem also occurs when the vehicles accelerate in a single gear, without shifting, the plaintiffs allege. “Drivers have reported that the shift is sometimes so violent, they feel as though they have been hit by another vehicle.”  The complaint alleges that, despite information from its authorized dealerships, the National Highway Traffic Safety Administration (“NHTSA”) and consumer complaints GM “failed to alert [consumers] of the true and unsafe nature of the Transmission Defect.” The complaint further alleges that even when consumers presented their vehicles to GM’s authorized repair facilities to address the transmission concerns, consumers were told that their vehicles we behaving normally or given ineffective repairs. 

Overall, the complaint alleges 104 separate charges relating to vehicles sold in 32 different states from California to New York.  The vehicles include: 

  • 2015-2019 Chevrolet Silverado
  • 2017-2019 Chevrolet Colorado
  • 2015-2019 Chevrolet Corvette
  • 2016-2019 Chevrolet Camaro
  • 2015-2017 Cadillac Escalade and Escalade ESV
  • 2016-2019 Cadillac ATS and ATS-V
  • 2016-2019 Cadillac CTS and CTS-V
  • 2016-2019 Cadillac CT6
  • 2015-2019 GMC Sierra
  • 2015-2019 GMC Yukon and Yukon XL
  • 2015-2017 GMC Yukon Denali and Denali XL
  • 2017-2019 GMC Canyon

Furthermore, according to the class action complaint and investigations by CCA’s attorneys, the transmission shuddering, shaking, jerking and hesitation relates to internal issues within the transmission not function properly and resulting in metal shavings being circulated throughout the transmission. What is worse, over time, damage to the transmission and torque converter occurs. Thus, consumers face escalating repairs that can include flushing the transmission of metal shavings caused by the defective transmission operation, and which eventually necessitates the replacement of components such as the torque converter, valve body, or the entire transmission. 

While GM has attempted several “band-aid” fixes for the beleaguered transmission, none have proven sufficient.  In fact, since 2015, GM has issued no less than thirteen versions of technical service bulletins (or TSBs) relating to these transmission issues. The TSBs related to the transmission issues have advised dealerships to, among other things: complete the “clutch drive learn procedure,” replace the valve body, replace the entire transmission, flush the cooler lines and cooler, remove debris from and clean the transmission pan, replace the transmission filter, replace the transmission fluid, and/or flush the transmission. However, in spite of these many prescribed “fixes” from Detroit, none have sufficiently remedied the problems for countless California Consumers   

Fortunately, the experienced lemon law attorneys at CCA are well-versed in the technical and legal nuances of pursuing legal action against GM. CCA’s seasoned litigators have obtained dozens of significant settlements for California consumers from GM and are here to help you – at no charge to you. If your GM vehicle has serious, unrectified transmission problems, we invite you to call us today for a free consultation: (833) LEMON-FIRM.