General Motors issues another round of recalls for brake assist system

Pleasanton, CA – November 25, 2020 – General Motors (NYSE:GM) has recalled 14,620 vehicles that operate with either 5.3L or 6.2L V8 engines. In each case, the  power of the mechanical vacuum pump  – which helps the engine with several key functions, including braking – may decrease. This may negatively affect the brake assist system. The recall includes:

  • 2018  Cadillac Escalade sedans
  • 2018 Chevrolet Silverado 1500 trucks
  • 2018 Chevrolet Tahoe SUVs
  • 2018 GMC Sierra 1500 trucks
  • 2018 GMC Yukon SUVs

Recall summary  

Among other functions, the mechanical vacuum pump provides power to the brake assist system. Due to a design error that was not addressed during a previous recall for the same issue last year, “the output” of the pump can drop over time, making the power brake assist system less effective.

There are several factors that alert the driver to the brake assist issue:

  • The brake pedal may vibrate when the driver applies the brakes
  • Braking requires more effort
  • A ticking sound is emitted from the engine compartment when the brakes are applied
  • The driver may see a “Service Brake” message pop up on the dash

Risks 

If the brake assist is not operating correctly, the driver must press on the brake pedal with more effort and depress it further to be able to stop the vehicle.

This change in braking ability increases the risk of a crash. Drivers may not be able to brake quickly enough to slow or stop the vehicle. GM notes that the problem is more apparent at low speeds when a driver applies soft pressure to the brakes.

The repair

To fix the issue, dealers will need to inspect the Electronic Brake Control Module and reprogram the system. The recall free of charge and began on November 16.

Is your vehicle part of this recall?

Over 14,000 vehicles are included in this General Motors recall. To see if your car is one of them, use MotorSafety’s free vehicle lookup tool.

Ken BoydGeneral Motors issues another round of recalls for brake assist system

General Motors recalls SUVs for blocked fuel pump nozzle

Laguna Hills, CA – November 16, 2020 – General Motors (GM) (NYSE: GM) has recalled 2,781 midsize SUVs which may have a blocked fuel pump nozzle that could stall the vehicle. The recall includes:

  • 2020 Buick Enclave
  • 2020 Cadillac XT5 and Cadillac XT6
  • 2020 Chevrolet Traverse
  • 2020 GMC Acadia

and concerns the fuel tank pump module (MODULE – F/TNK F/PMP, #84702674).

Recall summary  

The issue stems from the fuel pump, which supplies the vehicle’s engine with the gasoline it needs to run. A tube inside the fuel pump may be blocked by burrs left over from the manufacturing process. This could keep fuel from getting to the engine, particularly if the gas tank is already running low. If the engine is starved of fuel, the car could unexpectedly stall while driving.

Risks

A car that stalls in moving traffic, especially at high speeds, can get hit from behind as other drivers may not have enough time to react. Even if the driver safely gets to the shoulder, they are still at risk of being hit. This raises the risk of injuries or death for everyone involved.

For information on what to do if your car stalls, please see this article.

The repair

Owners will be notified about the recall by mail starting on November 30. GM will replace the fuel pump module for free, but this service is not yet available. In the meantime, owners who are not comfortable driving their recalled car may be eligible for courtesy transportation through their vehicle’s warranty.

Is your vehicle part of this recall?

Over 2,700 vehicles are part of this GM recall. To see if your car is one of them, use MotorSafety’s free vehicle lookup tool.

Rebecca RandGeneral Motors recalls SUVs for blocked fuel pump nozzle

General Motors recalls vehicles for contaminated brake booster

Pleasanton, CA – Sept 24, 2020 – General Motors (GM) (NYSE: GM) has recalled 6 different vehicle models which may have a contaminated component in the braking system. This contamination could disrupt sensor communications to the brake booster, making it harder to stop the vehicle and increasing the risk of a crash. The recall includes:

  • 2020-2021 Buick Encore GX subcompact SUVs
  • 2020 Cadillac CT4 and CT5 luxury sedans
  • 2020 Cadillac XT4 compact SUVs
  • 2020 Chevrolet Corvettes
  • 2021 Chevrolet Trailblazer crossovers

Recall summary  

The recall concerns the brake-by-wire system, which uses an electronic brake booster to help stop the car quickly without depending on how hard the driver presses the brake pedal. 

In June, GM launched an investigation after receiving multiple complaints about the strength of the brakes. They discovered that, due to a factory cleaning issue, the connector between the rotor position sensor and the electronic brake control module had been contaminated.

This contamination can disrupt communication between the two parts and disable the electronic brake booster.

Safety tips

Drivers with a failing brake booster may notice that their brakes are difficult to press. They may also notice an increase in the car’s stopping distance. 

Own one of these affected vehicles? It may be wise to keep an eye on the instrument panel, which will display a warning message if the brake booster fails. If this happens, keep the increased stopping distance in mind as you drive.

The repair

Dealers will replace the vehicles electronic brake control module for free. However, this repair is not yet available, as GM is still working on sourcing enough replacement brake boost modules. The company will notify owners when the repair becomes available.

Is your vehicle part of this recall?

Over 3,000 vehicles are part of this GM recall. To see if your car is one of them, use MotorSafety’s free vehicle lookup tool.

Rebecca RandGeneral Motors recalls vehicles for contaminated brake booster

General Motors trucks recalled for a software error

Laguna Hills, CA – Dec. 20, 2019 – General Motors LLC is recalling certain 2019 Chevrolet Silverado 1500, Cadillac CT6, and GMC Sierra 1500 vehicles. The Electronic Brake Control Module (EBCM) may have a software error that could disable the Electronic Stability Control (ESC) and Antilock Brake System (ABS).

The potential number of vehicles affected is estimated at 463,995.

The Defect

The affected vehicles have a software defect in the EBCM that will disable the ESC and ABS for a single ignition cycle. In situations where the ABS and ESC are disabled, the vehicle diagnostic’s telltale lamps won’t light up, leaving the driver unaware of the problem. Driving without knowledge of a defective ABS or ESC may increase the risk of a crash. In addition, the lack of warning of a defect puts the vehicles out of compliance with S5.3 of Federal Motor Vehicle Safety Standard 126 and S5.1 of Federal Motor Vehicle Safety Standard 135.

According to General Motors, an estimated one percent of the total vehicles for each model are affected.

Timeline of Events

On November 15, 2019, General Motors’ EBCM supplier, ZF TRW, informed the company that they had found a software error while investigating a related product. On December 5, 2019, General Motors’ Safety and Field Decision Authority decided to call for a noncompliance recall.

The Solution

General Motors will provide dealers with a list of affected vehicles through GM GlobalConnect Recall Reports. General Motors dealers are expected to reflash all affected EBCMs, updating the software and correcting the problem. Moving forward, the software error has been corrected for the 2020 model year.

Because all affected vehicles are the current model and under warranty, General Motors will not have to provide reimbursements. Owners can check to see if their vehicle is being recalled by searching their VIN number at www.vinrcl.safercar.gov/vin/. In some cases, courtesy transportation may be provided to affected drivers. Dealers will be notified of the recall December 12, 2019. GM will begin notifying individual owners January 27, 2020.

For more information on this or other recalls past or present, visit MotorSafety.org.

Sean ReyesGeneral Motors trucks recalled for a software error

Cadillac Luxury Sedan Recalled Over Sensor Issue

Laguna Hills, CA – November 5, 2019 – General Motors recently notified dealers that it would have to recall a small population of its Cadillac CT6 luxury sedans due to a problem with their tire pressure sensors.

In all, just 81 CT6 sedans from the 2020 model year will be recalled – 100% of which were identified as having this issue. The company noted that similar vehicles that did not have the accessory wheels installed at their dealers are not included in this recall.

The defect

Specifically, these vehicles – all produced between August 1 and September 9, 2019 – came equipped with specific accessory wheels that had been installed by dealers, but which do no meet Federal Motor Vehicle Safety Standard rules related to tire pressure monitoring systems.

This is because their sensors do not use the proper wireless radio frequency to communicate with the vehicle’s computer, and as a consequence, the system may not be able to properly alert drivers – via a warning light on the dashboard – that tire pressure has dropped to potentially dangerous low levels.

The problem at the heart of the issue is that incorrect part numbers for the tire pressure sensors were put into GM’s ordering system.

Ideally, the automatic system would turn on the warning light after 18 minutes of driving at least 28 miles per hour on tires with low pressure, but because of the mismatched radio frequency, this would not occur.

As a result, drivers may not know of the risks they face unless they manually check their tire pressure before or after a trip. Low pressure can have a detrimental effect on vehicle handling or lead to tire failure, both of which would increase the risk of an accident.

Timeline of events

In September, General Motors received a report about the issue through its Speak Up for Safety program that the wrong tire pressure sensors had been installed on the affected CT6 sedans with specific accessory wheels.

On September 24, the company opened an investigation into the issue, consulting with subject-matter experts and the company’s regulatory engineers.

The GM Open Investigation Review board looked at the findings of this examination on Oct. 7 and recommended that the company issue a recall.

Two days later, the GM Safety Field Action Decision Authority followed through on that recommendation.

The solution

Upon receiving their recall notices, owners should take their affected CT6 sedans to a certified GM dealer, where all four tire pressure sensors will be replaced with proper parts that use the right wireless frequency to communicate with the vehicle.

Given that these are all 2020 model year vehicles, the repairs are covered by warranty and no reimbursement will be offered.

The investigation also found that the incorrect part number that led to the wrong sensors being installed was corrected within GM’s ordering system on September 11. This means that all accessory kits shipped to dealers after that date had the correct sensors.

Dealers were notified of the recall on October 15, and owner notification dates are yet to be decided.

Check your car’s recall status using MotorSafety’s free vehicle lookup tool.

Sean ReyesCadillac Luxury Sedan Recalled Over Sensor Issue

General Motors Recalls Various Vehicles Due to Vacuum Pump

Laguna Hills, CA – September 17, 2019 – The possibility that vacuum pumps on various General Motors vehicles may fluctuate in performance over time has caused the company to conduct a vehicle recall.

According to the “Frequently Asked Questions” document provided by the manufacturer, General Motors has decided that a defect, which relates to motor vehicle safety exists in the following vehicles:

  • 2014 – 2018 Cadillac Escalade
  • 2014 – 2018 Chevrolet Silverado
  • 2014 – 2018 Chevrolet Suburban
  • 2014 – 2018 Chevrolet Tahoe
  • 2014 – 2018 GMC Sierra
  • 2014 – 2018 GMC Yukon

The defect

Within the vehicles that contain this defect, the engine-mounted mechanical vacuum pump output may decrease over time, diminishing the power brake assist and therefore increasing the distance required to stop the vehicle.

This ultimately leads to an increased possibility of crash or collision.

According to documents filed with the National Highway Traffic Safety Administration, the number of vehicles that potentially contain the defect is greater than 3,450,000, with GM estimating that 2 percent of the autos in that total are almost certainly affected by this issue.

The following vehicles make up the group possibly saddled with the vacuum pump problem:

  • Cadillac Escalade 2015 – 2017
  • Chevrolet Silverado 1500 2014 – 2018
  • Chevrolet Suburban 2015 – 2018
  • Chevrolet Tahoe 2015 – 2018
  • GMC Sierra 1500 2014 – 2018
  • GMC Yukon 2015 – 2018

There are certain symptoms that drivers may experience if their car is among those affected by the vacuum pump defect. For instance, they may feel vibration in the brake pedal, or experience a change in the amount of pressure required to depress the brake.

Other possible signs of the problem include a ticking noise coming from within the engine compartment and unintentional activation of the secondary hydraulic brake assist system, according to GM.

Finally, the manufacturer noted that if the vacuum level drops to a level below 10 kPA, a “Service Brake Assist” message will appear in the Driver Information Center within five minutes.

GM has determined that while the defect may potentially increase the possibility of collision, all of these vehicles are otherwise safe to drive before undergoing repair of the vacuum pump.

Timeline of events

According to a chronology provided by GM, the NHTSA opened a preliminary investigation into the subject in November 2018, at which point the manufacturer also began an internal investigation of the same issue.

In December, after reviewing the results of both investigations, GM’s Safety & Field Action Decision Authority decided to extend the warranty on vacuum pumps for all the vehicles listed above.

Then, in July 2019, GM received results of additional investigation into the subject by the NHTSA, which prompted yet another internal inquiry on the part of the manufacturer.

This final study concluded August 29, 2019, when GM decided to conduct an official recall on the automobiles to provide them with new software calibration.

Dealers were notified of the recall in early September 2019, with GM planning to send direct notifications to affected drivers in the near future.

The solution

Vehicles that contain the defect can be brought to a local dealership, where the dealer will reprogram the electronic brake control module with a new calibration that corrects the problem, should the vacuum assist become depleted.

Drivers who own a vehicle involved in the recall will be notified by mail. There will be no cost to vehicle owners for the repair or remedy.

Check your car’s recall status using MotorSafety’s free vehicle lookup tool.

Sean ReyesGeneral Motors Recalls Various Vehicles Due to Vacuum Pump

GM Recalls 2016 – 2018 Cadillac CTS and ATS, Chevy Camaro and Corvette for Power Steering Issue

Laguna Hills, CA – March 28, 2019 – General Motors is recalling certain 2016 – 2018 Cadillac CTS and 2017 Cadillac ATS, Chevrolet Camaro and Chevrolet Corvette vehicles because the power steering assist system may fail, increasing the risk of a crash. As many as 26,772 vehicles may be affected.

The defect

According to the National Highway Traffic Safety Administration report on this problem, the affected vehicles may experience a loss of electric power steering assist while driving. This would demand more effort in steering, especially at lower speeds, with a potentially greater risk of a crash.

Timeline of events

GM launched an investigation September 18, 2018 into loss of power steering assist in the 2017 Chevrolet Camaro.

Between September 19 and late October, GM’s safety investigator, with help from engineering experts, analyzed vehicle owner questionnaires, customer complaints, legal claims, and warranty data to assess the number of cases in the field and to identify common root causes.

An intermittent electrical loss within the torque-sensor printed circuit board was found in about 80 percent of the cases reviewed. The same issue was found in two Corvette steering gear assemblies. GM then expanded its investigation, discovering that the Cadillac CTS and ATS were also at risk.

Between November and mid-December, field analysis revealed spikes in warranty rates between June and September 2016, and a three-day window in February 2017.

Between mid-December and late January 2019, GM worked with its supplier to identify the problematic circuit boards and VIN numbers of affected vehicles.

Following an open investigation review, GM’s Safety Field Action Decision Authority decided  January 31 to conduct a safety recall.

The solution

The recall will begin March 2019. GM will notify owners, and dealers will replace the power steering gear assembly, free of charge. Owners will receive a second notice when the remedy becomes available. GM’s number for this recall is N182182760.

Check your car’s recall status using MotorSafety’s free vehicle lookup tool.

Sean ReyesGM Recalls 2016 – 2018 Cadillac CTS and ATS, Chevy Camaro and Corvette for Power Steering Issue

General Motors LLC Recalls 2019 Cadillac CT6 Vehicles for Turn Signal Defect

Laguna Hills, CA – March 25, 2019 – General Motors LLC is recalling certain 2019 Cadillac CT6 vehicles because rotating the steering wheel does not prevent the turn signals from flashing.

If the turn signals do not automatically stop, the driver may neglect to turn them off manually, misleading other drivers and pedestrians, which could increase the risk of a crash. Up to five vehicles may be affected by this issue.

The defect

According to the National Highway Traffic Safety Administration Report on this issue, rotation of the steering wheel will not automatically cancel the turn-signals from flashing after a turn is made.

Although this action can still be done manually, the driver may fail to respond when turn signals do not deactivate automatically, leaving the signals flashing for some time afterwards.

When this happens, a false turn signal may misinform pedestrians and other drivers, which could potentially lead to an accident or crash.

Timeline of events

General Motors issued its initial report on this problem on February 21, 2019. GM decided that certain 2019 Cadillac CT6 vehicles failed to conform to Federal Motor Vehicle Safety Standard 108, “Lamps, reflective devices, and associated equipment.”

The automaker then announced a recall beginning March 11.

The solution

Cadillac dealers will replace the turn signal switch at no charge. Dealers are to service all vehicles subject to this recall at no cost to customers, regardless of mileage, age of vehicle or ownership, from this time forward.

In addition, all affected vehicles currently in the dealer’s possession that have not yet been sold are also subject to the recall.

The vehicles must be inspected and repaired before they are delivered to customers, dealer-traded, released to auction, used for demonstration or any other purpose.

Courtesy transportation is available for U.S. customers whose vehicles are involved in this recall and within the coverage period for the warranty associated with this action.

The NHTSA Campaign Number for this recall is 19V117.

Check your car’s recall status using MotorSafety’s free vehicle lookup tool.

Sean ReyesGeneral Motors LLC Recalls 2019 Cadillac CT6 Vehicles for Turn Signal Defect

GM Recalls Over One Million 2015 Vehicles Due to Faulty Steering Assist

Lilburn, Georgia – September 22, 2018 – General Motors has discovered a defect which relates to motor vehicle safety in the following vehicles:

  • 2015 Chevrolet Silverado LD
  • 2015 Suburban and Tahoe vehicles
  • 2015 GMC Sierra LD and Yukon vehicles
  • 2015 Cadillac Escalade

GM has issued a recall for over one million vehicles.

The defect

According to the NHTSA Safety Recall Report, the affected vehicles may experience a temporary loss of EPS assist, followed by a sudden return of EPS assist.

This is most likely to happen during low-speed turning maneuvers. The loss and sudden return of EPS assist typically occurs within a 1 second period. The steering malfunction is caused by an electrical/software issue.

The danger lies in the fact that if EPS assist is lost and suddenly returned, the driver could have difficulty steering the vehicle. The likelihood of a crash is increased, especially at low speeds.

Low speed turns can cause temporary low voltage conditions, and if system voltage drops below 8.8 volts for more than 1 second, EPS assist is disabled. When voltage returns to 9 volts for a minimum of 40 milliseconds, EPS assist returns.

If power steering assist is lost a driver information center message may alert the driver to an EPS problem, and other electrical sub-systems may shut down just prior to or at the same time as the EPS event.

This can cause disruption to operation of the radio, stabilitrack, the DIC, chimes, door-lock cycling, air conditioning, or cruise control.

Timeline of events

In late June 2018, an increase in field reports and customer complaints about EPS issues led GM to open a safety investigation into loss of EPS in the subject vehicles. 

GM’s safety investigator and engineering-analysis experts determined the loss-of-EPS issues was caused by the same electrical issue discovered in trucks that GM recalled in 2017. GM’s Safety Field Action Decision Authority subsequently chose to conduct a safety recall.

The solution

According to an NHTSA FAQ published for the recall, customers who own a vehicle involved in the field action will be notified by mail by General Motors, but the exact date the recall will begin is not yet set and the manufacture has not published a notification schedule.

Dealers will perform a reflash of the EPS module software. The inspection/repair will be done at no cost to the customer, and is available at Cadillac, Chevrolet and GMC dealers. Customers are strongly urged to repair their vehicle as soon as possible.

Courtesy transportation is available for customers whose vehicles are involved in the recall, and whose vehicles are still within the warranty coverage period for the warranty which is associated with the recall.

Check your car’s recall status using MotorSafety’s free vehicle lookup tool.

Sean ReyesGM Recalls Over One Million 2015 Vehicles Due to Faulty Steering Assist

GM Recalls Vehicles with Defective Child Restraint Features

Warren, Mich. – July 26, 2018 – General Motors has recalled more than 22,000 vehicles potentially equipped with defective child restraint components, according to documentation submitted to the National Highway Traffic Safety Administration.

The campaign affects 2016 – 2018 Cadillac CT6 luxury sedans produced between September 4, 2015, and September 21, 2017. The American automaker suspects 90 percent of the models involved in the action contain the defective parts.

The defect

Affected vehicles feature inboard child restraint anchorage bars containing excess adhesive. As a result, the diameter of these components may surpass factory standards and interfere with the installation of child seats.

This defect poses a serious safety hazard to young passengers. However, GM has yet to receive field reports connecting the defect to any accidents or injuries.

In addition to creating a safety risk for passengers, the defect violates Federal Motor Vehicle Safety Standard 225, which states that all vehicles sold in the U.S. must have child restraint anchorages that are “accessible without the need for any tools other than a screwdriver or coin {and}, once accessed, be ready for use without the need for any tools.”

Timeline of events

On February 15, 2018, a GM quality assurance employee inspecting a recently assembled 2018 Cadillac CT6 discovered what appeared to be excess body adhesive on one of the vehicle’s inboard child restrain anchorage bars.

Nine days later, another worker discovered additional vehicles with the same issue, prompting him to file an official report through the automaker’s internal Speak Up For Safety program.

GM investigated the claim and found no field reports detailing incidents related to the issue. Despite these findings, the car company decided to widen the scope of the inquiry to include 2016 and 2017 Cadillac CT6 sedans on April 10, 2018.

The investigation would also assess whether the flaw violated FMVSS 225.

Over the course of the expanded investigation, GM failed to find field reports mentioning 2016 – 2018 Cadillac CT6 sedans with defective child restraint anchorage bars. However, the car manufacturer chose to continue the inquiry.

Throughout May and June 2018, GM engineers inspected dealership- and employee-owned Cadillac CT6 sedans.

The company also conducted tests to determine if the adhesive-covered bars inhibited child safety seat installation and measured these fixtures to determine if their diameters changed due to the defect.

This investigation revealed several key pieces of information. First off, all of the vehicles that exhibited the defect seemed to originate from the GM assembly plant located in Detroit, which has amended its body adhesive application process in September 2017.

This production line change ultimately caused the defect. GM engineers also managed to confirm the excess body adhesive did alter the diameter of the inboard child restraint anchorage bars, making them incompatible with most car seat models.

Lastly, the investigation showed that the bars did violate FMVSS 225.

On June 21, 2018, the members of the GM Safety and Field Action Decision Authority convened and reviewed the issue. After evaluating the data from both inquiries, the group chose to initiate a voluntary safety recall.

GM notified dealers of the forthcoming action June 28, 2018.

The solution

The automaker has directed dealers to inspect the inboard child restraint anchorage bars installed in recalled vehicles, remove any excess body adhesive and apply anti-corrosion coating, according to an NHTSA recall acknowledgement document.

Technicians will perform this work free of charge. GM has yet to release a timetable for owner notification.

Check your car’s recall status using MotorSafety’s free vehicle lookup tool.

Sean ReyesGM Recalls Vehicles with Defective Child Restraint Features