GM recalling 3.5M pickups, SUVs due to braking issue

WASHINGTON — General Motors  is recalling 3.46 million U.S. pickup trucks and SUVs to address a vacuum pump issue that could make braking more difficult and increase the risk of a crash.

The recall covers certain Cadillac Escalade, Chevrolet Silverado, Chevrolet Suburban, Chevrolet Tahoe, GMC Sierra, and GMC Yukon vehicles from the 2014-18 model years. 

It was triggered because the amount of vacuum created by the vacuum pump may decrease over time, GM told the National Highway Traffic Safety Administration in documents posted Wednesday.

NHTSA opened a preliminary investigation into the issue in November 2018, and said it had reports of nine related crashes and two injuries. It provided GM in July with additional field reports that prompted the automaker to open an investigation. GM said it could affect braking in “rare circumstances.”

NHTSA said in a statement the “vehicles may experience brake boost failure, which would require increased brake pedal effort, leading to a hard brake pedal feel, and potentially increased stopping distance.”

GM said dealers will reprogram the electronic brake control module to improve how the system utilizes the hydraulic brake boost assist function when vacuum assist is depleted.

GM said the vacuum assist pump, which is lubricated with engine oil that flows into the pump through a filter screen, can in some cases lose effectiveness over time, as debris such as oil sludge can accumulate on the filter screen.

GM told NHTSA that prior model years used a different brake assist system design, and vehicles manufactured after 2018 were not equipped with the affected pump design.

Separately, GM said Wednesday is recalling 270,000 U.S. additional vehicles in three smaller recalls, including 177,000 2018 Chevrolet Malibu cars with 1.5L turbo engines because an error in the engine control module software may result in the fuel injectors being disabled.

It is also recalling 91,000 Chevrolet Express and GMC Savana vehicles from model year 2019 because the seatbelt-unfastened warning light will not illuminate for approximately five seconds after the ignition is moved to the “on” or “start” position, which means they are not in compliance with federal motor safety regulations.

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Section Page News – Automotive News

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