Electronic Brake System Failures Following GM Safety Recall

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Thread: Electronic Brake System Failures Following GM Safety Recall

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    Electronic Brake System Failures Following GM Safety Recall

    Following a massive GM safety recall for the electronic braking system on various 2019 model year GM vehicles, 1,600 - 1,700 vehicle owners have reported a total braking system failure: https://www.freep.com/story/money/ca...ps/4598068002/

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    Re: Electronic Brake System Failures Following GM Safety Recall

    Serious problem GM needs to get resolved immediately. My only question is, Who in their right mind after a total brake failure does not pull over, call onstar and demand the car be towed to the dealer and a loaner given? Not only did one of the people keep going, they continued to use the vehicle. I call that russian roulette.

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    Re: Electronic Brake System Failures Following GM Safety Recall

    The affected component is the Integrated Brake Control Unit, designed by ZF. It replaces the traditional vacuum booster used for power brakes with an electronic actuator and associated software.

    In addition to 2019-2020 Silverado and Sierra LD and 2021 Tahoe, Suburban, Yukon, and Escalade, the system is now being used in 2019-2020 CT6 2.0T and Blackwing, 2019-2020 XT4, 2020 XT5, 2020 CT4, 2020 CT5, 2020 Blazer, and 2020 Acadia. GM plans to add IBC to other models in the coming years.

    Here is ZF's press release:

    Quote Originally Posted by ZF
    "Friedrichshafen, Germany / Livonia, Mich.
    ZF has launched its first production Integrated Brake Control (IBC) system on the 2019 Chevrolet Silverado. The IBC is a vacuum-independent technology that simplifies the brake system’s architecture while offering enhanced performance capabilities. It also features world class brake pedal response for large trucks with a car-like feel that inspires confidence in the vehicle’s brake system.
    "
    Last edited by gkr778; 01-29-2020 at 11:36 AM.
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    Re: Electronic Brake System Failures Following GM Safety Recall

    I have a feeling that this may not be a ZF problem because my Suburban and Tahoe still use the vacuum-based brake system and they've been plagued with multiple firmware upgrades. The fact that similar issues continue even with the new brake module leads me to believe that there's a potential GM problem here and integration was less than stellar.
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    Re: Electronic Brake System Failures Following GM Safety Recall

    Quote Originally Posted by GMOwner View Post
    I have a feeling that this may not be a ZF problem because my Suburban and Tahoe still use the vacuum-based brake system and they've been plagued with multiple firmware upgrades. The fact that similar issues continue even with the new brake module leads me to believe that there's a potential GM problem here and integration was less than stellar.
    GMOwner, was your Suburban and Tahoe part of the huge recall announced last September (19V645)? Here's the link:
    https://static.nhtsa.gov/odi/rcl/201...9V645-6988.pdf

    As you noted, all of the affected vehicles in that campaign used a traditional vacuum pump for the braking system.

    And you are correct that ZF isn't to blame for the issue mentioned in the OP. GM found an error in its own software for IBC equipped vehicles. GM stated, "in rare cases, disable the vehicle’s electronic stability control (ESC) and antilock brake system (ABS) systems for a single ignition cycle"
    Link: https://static.nhtsa.gov/odi/rcl/201...9V889-7920.pdf

    GM issued a software update to correct this error. Unfortunately, the software update introduced a new error: when an IBC equipped vehicle is started using the OnStar mobile phone app, it may cause IBC to fail altogether, resulting in the loss of power brakes.
    Last edited by gkr778; 01-29-2020 at 12:52 PM.
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    Re: Electronic Brake System Failures Following GM Safety Recall

    Quote Originally Posted by gkr778 View Post
    GMOwner, was your Suburban and Tahoe part of the huge recall announced last September (19V645)? Here's the link:
    https://static.nhtsa.gov/odi/rcl/201...9V645-6988.pdf

    As you noted, all of the affected vehicles in that campaign used a traditional vacuum pump for the braking system.

    And you are correct that ZF isn't to blame for the issue mentioned in the OP. GM found an error in its own software for IBC equipped vehicles. GM stated, "in rare cases, disable the vehicle’s electronic stability control (ESC) and antilock brake system (ABS) systems for a single ignition cycle"
    Link: https://static.nhtsa.gov/odi/rcl/201...9V889-7920.pdf

    GM issued a software update to correct this error. Unfortunately, the software update introduced a new error: when an IBC equipped vehicle is started using the OnStar mobile phone app, it may cause IBC to fail altogether, resulting in the loss of power brakes.

    Pretty bad when the safety recall fix fails, and the fix creates another problem which could be deadly. GM still can’t stop making vehicles and then soon announcing safety recalls - in this case, a critical one that is problematic.

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    Re: Electronic Brake System Failures Following GM Safety Recall

    It's a good idea to dump old, tried-and-true boring unsexy fixtures that actually work and can't go wonkie and bonkers. You know, like a vacuum brake booster, suckie old school junk like that!

    It's NEW! It's IMPROVED! It's SEXY! It has glitches! We build excitement!
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    Re: Electronic Brake System Failures Following GM Safety Recall

    Know someone who had recall done and had a braking "anomaly" afterwards. Was told to quit using the onstar remote start app.
    On a 2019/20 GMC 1500.

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    Re: Electronic Brake System Failures Following GM Safety Recall

    Quote Originally Posted by Lowboy View Post
    Know someone who had recall done and had a braking "anomaly" afterwards. Was told to quit using the onstar remote start app.
    On a 2019/20 GMC 1500.
    Well that's encouraging. Mix n match.
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    Re: Electronic Brake System Failures Following GM Safety Recall

    Shouldn't that be electronic broke system?

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    Re: Electronic Brake System Failures Following GM Safety Recall

    Onstar remote start app???

    God.

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    Re: Electronic Brake System Failures Following GM Safety Recall

    Updated information regarding the safety defect with the braking system: https://www.freep.com/story/money/ca...es/4654878002/

    In last December, GM became aware of the NEW safety defect, caused by the safety recall fix - but didn’t notify owners in a timely manner. About 1,700 vehicle owners reported braking system failures after their vehicle was recalled and fixed by GM (which caused the new problem of the potential for a brake system failure when using the OnStar app).

    You can’t make this stuff up.

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    Re: Electronic Brake System Failures Following GM Safety Recall

    Quote Originally Posted by gkr778 View Post
    GMOwner, was your Suburban and Tahoe part of the huge recall announced last September (19V645)? Here's the link:
    https://static.nhtsa.gov/odi/rcl/201...9V645-6988.pdf
    Yes, but, the problem still persists as stated. The first one fixed the original problem, but, created other problems (something with problem recurring when transfer case module engaged). Then the second fix just brought the problem back...

    The good thing is that my brake controller now has a 150K mile warranty.
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