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 of the vacuum pump in the power assist brakes last year, essentially “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 is 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 recall lookup tool.