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


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.


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

GM Recalls More Than 1,000 Chevy Malibus for Air Bag Defects

Detroit – January 31, 2019 – General Motors is recalling certain 2010 – 2011 Chevrolet Malibu vehicles, due to a potentially dangerous air bag defect. Up to 1,145 units may be affected by this issue.

The defect

According to the National Highway Traffic Safety Administration Safety Report, in the event of a crash necessitating deployment of the driver frontal air bag, the air bag inflator in these cars may explode due to being over pressurized.

If the inflator explodes, sharp metal fragments may strike the driver or other occupants, resulting in serious injury or death.

Timeline of events

On November 30, 2017, an attorney contacted GM and claimed that on September 22, 2017, the front-driver air bag inflator in a 2011 Chevrolet Malibu ruptured during a crash-related deployment and injured his client.

GM reported the allegation to NHTSA on December 6 of the same year in accordance with Standing General Orders 2015-01 and 2015-02.

Between November 30, 2017 and December 13, 2018, GM made multiple attempts to locate and inspect the vehicle to confirm whether or not a rupture had occurred.

A GM engineer was permitted to inspect the vehicle and components. Based on that examination, GM determined that the front-driver airbag inflator in the subject vehicle likely over pressurized and ruptured during deployment.

On December 19, 2018, GM presented the inspection photos and the other findings of its preliminary analysis to the NHTSA. On December 20, 2018, GM’s Safety Field Action Decision Authority (SFADA) decided to conduct a safety recall on the ARC inflators built in the suspect manufacturing lot.

At the time of the initial filing, GM was not aware of other rupture allegations involving this ARC inflator in GM vehicles.

The solution

GM has notified owners of these potentially problematic vehicles, and dealers will replace the front driver air bag module for free. Interim notices informing owners of the safety risk were mailed February 8, 2019.

Owners will receive a second notice when the remedy becomes available, which is expected to be in late March 2019. GM’s number for this recall is N182206630.

The NHTSA Campaign Number for this recall is 19V-019000.

To find out if your vehicle is part of this recall, use’s free look-up tool.

Sean ReyesGM Recalls More Than 1,000 Chevy Malibus for Air Bag Defects

GM recalls vehicles with defective passenger presence systems


Warren, Mich. – July 13, 2018 – General Motors has recalled more than five dozen vehicles potentially equipped with defective passenger presence systems, according to documentation submitted to the National Highway Transportation Safety Administration.

The campaign affects 2016-2018 Chevrolet Malibu sedans produced between Nov. 20, 2015, and Sept. 8, 2017. The American automaker suspects all of the vehicles involved in the action contain the defective components.

The Defect

Affected models contain replacement PPS assemblies that were installed as part of an earlier service initiative. However, these features, which are designed to detect seated passengers and signal the air bags to deploy in the event of an accident, contain miscalibrated parts.

These flawed components may cause the PPS software to misclassify children or smaller adults, inhibiting air bag functionality during collisions. The defect therefore poses a serious safety hazard to passengers. That said, GM has yet to receive reports connecting the problematic PPS assemblies to any accidents or injuries.

Timeline of Events

On Feb. 8, 2018, a GM engineer managing the PPS replacement initiative noticed that the part numbers for a number of the substitute PPS assemblies installed in 2016-2018 Chevrolet Malibu sedans were incorrect. This error indicated that some dealers may have installed the wrong replacement parts in some vehicles – specifically, PPS software not calibrated to the correct vehicle seat position.

Five days later, the design release engineer who discovered the issue notified the GM corporate office via the company’s Speak Up For Safety program. The engineer then began releasing work orders in an effort to address the issue proactively and did so until March 14, 2018.

On March 16, 2018, GM launched an official internal investigation. The automaker found that the GM engineering team had released two replacement PPS assemblies as part of the earlier repair initiative: one made for vehicles with vented seats and another made for vehicles with non-vented seats. Due to a part numbering mishap, these two components were mislabeled, meaning a number of dealers had likely installed incompatible parts in numerous 2016-2018 Chevrolet Malibu sedans and had unknowingly created a serious safety hazard.

GM evaluated the issue May 25, 2018, and decided that a voluntary safety recall was necessary.

The automaker informed dealers June 14, 2018.

The Solution

GM has directed dealers to replace the front PPS assemblies in affected vehicles free of charge, according to an NHTSA recall acknowledgment document. However, the car manufacturer has yet to release an owner notification timetable.

Owners in need of assistance can speak with GM customer service personnel by calling (800) 222-1020. Callers should use the internal recall identification number 18208. Owners can also reach out to the NHTSA directly using the agency’s Vehicle Safety Hotline at (888) 327-4236.

Sean ReyesGM recalls vehicles with defective passenger presence systems

GM recalls vehicles over software update error


Warren, Mich. – June 29, 2018 – General Motors has recalled an estimated 3,233 vehicles after a recent update to the Hybrid Powertrain Control Module 2 could potentially disable the cell balancing function and result in a low-voltage condition. The recall affects select 2013 Chevrolet Volts, according to documents from the National Highway Transportation Safety Administration. The estimated figure of cars with this particular defect is 2 percent.

The Defect

Vehicles that received a software updated in a service procedure from a dealer may contain an error in the software update that could prevent the batteries from balancing the voltage in singular battery cells. Under certain circumstances, this may result in a low-voltage condition in one or multiple battery cells. The vehicle will notify drivers if the battery cells fall below a certain level and if the driver continues on the road after entering reduced power mode, the vehicle may lose propulsion. This incident may increase the risk of crash and injury.

Timeline of Events

A GM engineer sent in a Speak Up For Safety report on May 11 after finding that a software update used on select 2013 model-year Chevrolet Volt vehicles contained an error that could potentially prevent batteries in some of these vehicles from effectively balancing the voltage among individual battery cells, according to internal reports. Following this report’s submission, GM launched an investigation, where the investigator reviewed field data, which demonstrated elevated rates of the condition in the field for vehicles with this update.

Afterward, GM’s Open Investigation Review board reviewed the investigation June 6, and the GM’s Safety and Field Action Decision Authority ultimately decided further action was necessary and issued a safety recall for these vehicles on June 7.

GM notified dealers of this safety recall June 14 and the National Highway Traffic Safety Administration June 20. Owners will receive recall details and dates will available.

The Solution

According to an internal communication, GM will notify drivers, while dealers will reprogram the Vehicle Interface Control Module module at no cost to the cars’ owners. A notification schedule has not yet been provided, but customers who own this vehicle will be notified by mail or can check their Vehicle Identification Number on GM’s website. Owners who want further information can contact Chevrolet customer service at (800)-222-1020. They can also call the NHTSA’s Vehicle Safety Hotline at (888)-327-4236.

Sean ReyesGM recalls vehicles over software update error

GM recalls vehicles with defective engine software


Warren, Mich. – June 27, 2018 – General Motors has recalled almost 500 vehicles potentially equipped with defective engine software, according to documentation submitted to the National Highway Transportation Safety Administration. The campaign affects 2019 Chevrolet Corvette ZR1 sports cars manufactured between Dec. 8, 2017, and May 31, 2018. The American automakers suspects just 1 percent of the models involved in the action contain the defective software.

The Defect

Affected vehicles come with sensing diagnostic module software that may fail when exposed to hard braking or extreme acceleration. In the event of SDM failure, crash sensing and air bag deployment functionality may be inhibited. This defect therefore poses a serious safety risk to occupants. However, GM has yet to receive field reports connecting the defective software to any accidents or injuries.

Owners in possession of vehicles that have experience SDM failure will not receive airbag readiness or diver information center notifications.

Timeline of Events

GM personnel on April 30, 2018, hosted a media demonstration in Atlanta, during which a 2019 Chevrolet Corvette ZR1 was subjected to race-like driving conditions. Following the event, GM engineers assessed the vehicle and found that its SDM software was not operating properly. These technical specialists brought the issue to the attention of the automaker May 3, 2018, via an internal Speak Up For Safety report. GM opened an investigation in response May 8, 2018.

During this inquiry, the engineering team at the GM Proving Grounds in Milford, Michigan conducted road tests involving hard braking and extreme acceleration. Following these trials, the group reviewed vehicle performance data and concluded that such maneuvers caused SDM overstress, which in turn led to complete software failure.

The GM Open Investigation Review evaluated the the matter May 21, 2018, before sending it to the Safety Field Action Decision Authority. The SFADA ultimately decided that a voluntary recall was necessary and initiated such action May 24, 2018.

GM notified dealers of the forthcoming campaign May 31, 2018.

The Solution

The automaker has directed dealers to reprogram the SDM software in affected models free of charge, according to an internal communication. GM intends to notify owners via first-class mail June 29, 2018. Owners in need of more immediate assistance prior to the start of the recall can contact GM customer service at (866) 522-9559. They can also connect with the NHTSA directly using its Vehicle Safety Hotline at (888) 327-4236.

Sean ReyesGM recalls vehicles with defective engine software

GM recalls over 3,000 Volts due to software glitch affecting battery


Warren, Mich. – June 25, 2018 – General Motors LLC has recalled several thousand of its Chevrolet Volt models due to a software update flaw that may adversely affect the plug-in vehicle’s battery functionality, according to documentation submitted to the National Highway Traffic Safety Administration. The automaker believes the recall is warranted because affected cars may result in a crash, especially in situations where drivers need to accelerate to keep pace with the flow of traffic.

The Defect

Earlier this month, GM recalled approximately 3,233 Chevrolet Volts – with 2013 model years – after dealers performed a software update of the plug-in hybrid’s on-board battery, specifically its Hybrid Powertrain Control Module 2 or HPCM2. The update was meant to improve the life and sustainability of the HPCM2, but some of the software updates were corrupted, the company believes, potentially resulting in a voltage imbalance situation between the individual cells that give the plug-in hybrid the energy it needs to operate. Should the voltage dip below a certain threshold, the vehicle may enter a reduced power mode, thus preventing motorists from accelerating.

Although General Motors suspects just 2 percent of the 3,200+ Volts are affected, the automaker contends the recall is warranted because motorists operating the Volts with the flaw are at an increased risk for a crash due to a loss of propulsion that impacted vehicles may experience. No known crashes, injuries or deaths have been linked to the improper cell balancing defect.

Timeline of Events

The issue first came to light in May, when a GM engineer discovered the problematic software and informed GM of the issue after filing a Speak Up for Safety report, based on a chronology of events submitted to and published by the NHTSA. GM subsequently launched an investigation, although the automaker was already looking into a similar but unrelated issue relating to low-voltage output. The investigation revealed that the likelihood of Volts losing propulsion seemed to depend upon whether the vehicles had received a software update.

By June 7, GM’s Safety and Field Action Decision Authority determined that a safety recall was appropriate out of an abundance of caution.

The Solution

GM says it will inform owners of 2013 Volts about the software glitch, who can then go to their nearest dealership to have their HPCM2 reprogrammed for free, according to an NHTSA internal briefing document. The reprogramming will entail an update to the Volt’s vehicle interface control modules. However, GM didn’t say when the notifications would be sent out or how motorists will be informed. All of the affected Volts were sold within the continental U.S.

Owners who believe they may be impacted may get in touch with their Chevrolet dealer by dialing the toll free number at 1-800-222-1020. The reference number for this specific recall is 18215.

Alternatively, drivers may also go to NHTSA’s website at or call the Department of Transportation Vehicle Safety Hotline at 1-888-327-4236.

Sean ReyesGM recalls over 3,000 Volts due to software glitch affecting battery

GM recalls SUVs with defective drive shafts

Recall Masters -August 31, 2017

GM recalls SUVs with defective drive shafts

General Motors has recalled a number of sport utility vehicles believed to be equipped with defective drive shafts, according to documentation filed with the National Highway Transportation Safety Administration. The campaign affects 2017-2018 GMC Arcadia, 2018 GMC Terrain and 2018 Chevrolet Equinox models. The automaker estimates that 3 percent of the vehicles have problematic drive shafts.
The Defect
Models referenced in the recall could contain front right intermediate drive shaft assemblies prone to fracture and separation. Engineers have traced the issue to the parts manufacturer Nexteer, which failed to use properly calibrated ultrasonic scanning equipment when performing quality checks.
The defect poses a serious safety hazard to occupants, as vehicles with damaged drive shafts may lose power during operation or roll away when stopped without the parking brake engaged. However, GM has yet to receive reports of accidents or injuries connected to the defect…

Read the entire article on the Recall Masters website

Sean ReyesGM recalls SUVs with defective drive shafts

GM Recalls Buick Verano Vehicles for Fuel Line Problems

Warren, Mich. — September 27, 2016 — In recent GM recall news, some 2016 Buick Verano autos may be subject to a fire hazard due to fuel line defects. The Part 573 Safety Recall Report from the National Highway Traffic Safety Administration website stated that affected autos have a 2.0 liter turbocharged engine and were manufactured between Feb. 16 and May 12, 2016.

This source said that fuel lines in these Buicks could fail if they make contact with heated sections of the engine. This could lead to a fire if the lines in question are worn away enough, causing fuel to leak out. A total of 189 vehicles are potentially involved in this action, and all 100 percent of them are estimated to have the defect.

The first engine fire associated with this problem occurred June 20 in the car of a GM employee, according to the Report. As of Aug. 10, this was the only fire caused by this defect that had been seen in the field.

Dealer Notification was planned for Aug. 10, and the remedy requires the dealer to replace the fuel line assembly entirely. Since the defect comes from improperly assembled fuel lines, the new replacement assemblies will have the proper engine compartment routing. GM found out that the vehicle issue stemmed from “poor operator training” on July 18.

A recall bulletin from the manufacturer listed all of the parts needed to complete the recall’s system replacement. This list includes eight parts total, such as a fuel-feed pipe and charge air cooler inlet air tube adapter seal for each vehicle.

adminGM Recalls Buick Verano Vehicles for Fuel Line Problems

Chance of Fire Prompts General Motors Recalls

Warren, Mich. — September 13, 2016 — Wiring issues may make a fire more likely to break out in one Buick model. Although there is no remedy scheduled as of this writing, one of the more recent General Motors recalls addresses this problem. The component manufacturer in this recall is Lear Corporation, based in Germany.

The official Part 573 Safety Recall Report on the National Highway Traffic Safety Administration website said that the recall potentially involves 42,984 2011 Buick Regals. A full 100 percent of these are thought to have a wiring harness problem that could wear down the wires themselves.

This chafing could potentially lead to a short circuit, which in turn could start a fire within the vehicle. In addition, the report cited other possible side effects, such as smoke, sparks and flickering instrument-panel lights. Despite this, it did not list any signs to be taken as “identification” of the defect.

The fix requires dealers to repair faulty wiring, if needed, after inspecting and securing the harness. There is also no apparent danger of wire chafing in similar vehicles manufactured after 2011 in Russelheim.

Though the decision to conduct the recall only came June 29, it dates back to Dec. 21, 2015. On that date, the source said, customer reports of fire led to a a Speak Up for Safety report.

A July 7 notice for dealers said that the parts necessary to conduct this recall fix were not currently available: dealers can only proceed once they are. This statement also announced that the Global Warranty Management system would update to reflect the new recall, as a way for dealers to prepare to address owner concerns.

adminChance of Fire Prompts General Motors Recalls