GM Truck Recall – Brake Problems
Chevrolet, GMC and Cadillac vehicle owners have reported brake problems and defects.
August 2019 – AP – General Motors is recalling nearly 3.8 million big pickup trucks and SUVs in the U.S and Canada to fix a brake problem.
The recall covers the Chevrolet Silverado and GMC Sierra 1500, 2500 and 3500 pickups from the 2014 through 2018 model years. Also included are the Cadillac Escalade from 2015 to 2017, and the GMC Yukon and Chevy Suburban and Tahoe from 2015 through 2018.
GM says that as it ages, the pump in the power-assist brakes can put out less vacuum power than needed, increasing stopping distance and the risk of a crash.
Dealers will recalibrate the electronic brake control module at no cost to customers. Owners were to be notified starting Sept. 6.
GM says the problems occur rarely and mostly at low speeds like driving in parking lots. Even with the problem, the brakes “continue to function and exceed the requirements of the appropriate federal motor vehicle safety standard,” GM spokesman said.
The vacuum pump is lubricated with engine oil that flows through a filter screen. In some of the trucks, oil sludge or other debris can clog the screen, reducing oil flow and causing the pump’s vacuum output to drop, GM spokesman said.
The trucks, he said, have a secondary power brake assist system which works when there are problems with the main system, but it is limited at lower speeds. The reprogramming will activate the secondary system faster.
GM isn’t replacing the pumps because pump failures are rare and already are covered by an extended warranty, GM spokesman said. “This remedy will improve brake performance in any situation where brake vacuum drops,” he said.
Drivers could feel a vibration in the brake pedal or a change in pressure required to push the brake pedal if their trucks have the vacuum pump problem. If the problem surfaces, owners will see a message on their dashboard telling them to service the brake assist system, GM spokesman said.
The recalled vehicles and model years are as follows:
2014-2018 Chevrolet Silverado
2014-2018 GMC Sierra
2015-2017 Cadillac Escalade
2015-2018 GMC Yukon
2015-2018 Chevrolet Suburban
2015-2018 Chevrolet Tahoe
RECALL Subject: Vacuum Pump May Decrease Power Brake Assist , 1 INVESTIGATION(S)
Report Receipt Date: SEP 06, 2019
NHTSA Campaign Number: 19V645000
Component(s): SERVICE BRAKES, HYDRAULIC
Potential Number of Units Affected: 3,456,111
Manufacturer: General Motors LLC
SEPTEMBER 2019 – General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time. As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash. GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The manufacturer has not yet provided a notification schedule. GM’s number for this recall is N192268490.
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