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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteNHTSA’s initial investigation documented reports of brake-assist loss in 2023 Cadillac Lyriq vehicles and recorded GM’s explanation of a possible internal eBoost spindle fracture during an anti-lock braking event. That opening record is not a final agency finding that a defect exists, nor does it establish the investigation’s full later scope.
What NHTSA’s initial investigation says
NHTSA opened Preliminary Evaluation PE24011 on April 11, 2024, to examine electronic brake module component failure reports involving model-year 2023 Cadillac Lyriq vehicles. The agency’s Office of Defects Investigation (ODI) said it received multiple Early Warning Reporting field reports alleging loss of brake boost assist, a hard brake pedal, and a “Brake System Failure” message at startup or while driving. NHTSA said GM verified the field reports. NHTSA’s PE24011 opening resume summarizes those reports and GM’s account.
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What GM reported about the failure mechanism
In the opening resume, NHTSA records GM’s statement that the electronic brake control module, also called eBoost, has an internal spindle that can fracture during an anti-lock braking system (ABS) event. GM described possible consequences as loss of brake assist, speed limitation, and some loss of ABS functionality. These are the manufacturer’s reported mechanism and consequences, not independent findings by NHTSA.
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Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →The same resume says GM introduced a new material clean break point in assembly plants in May 2023. That is a manufacturer statement in the opening document; by itself, it does not demonstrate that the change corrected the risk across all potentially affected production.
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Why the investigation is a verification story
An investigation’s opening is a fact-finding step, not a final determination that a safety defect exists or a decision to order a recall. NHTSA explains the stages and public records on its investigations page. For this case, the central questions are what component failed, under which operating conditions, how the failure affects braking and ABS, which vehicles share the relevant hardware and production characteristics, and what evidence shows whether any response addresses the risk.
The available initial resume establishes the reported symptoms and GM’s explanation as recorded by ODI. It does not establish a completed independent finding about the defect or the full later scope. NHTSA’s investigation record is where publicly available case documents are added as they become available; the current record is needed to confirm any later scope, findings, or incident counts.
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Do not confuse this case with a separate Equinox EV recall
A distinct NHTSA recall report, 25V-012, concerns certain 2025 Chevrolet Equinox EV AWD vehicles. GM identified an incorrectly set brake system control module software calibration on affected AWD models without Super Cruise; the calibration could prevent adaptive cruise control from bringing the test vehicle to a complete stop as expected. GM’s safety authority decided to conduct a recall on January 9, 2025. This is a software-calibration issue, not evidence of a connection to the Lyriq eBoost spindle-fracture investigation. See the NHTSA recall report.
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How Lyriq owners can check their vehicle
- Find the vehicle identification number (VIN), typically on the driver-side dashboard near the windshield or on registration and insurance documents.
- Enter the VIN in NHTSA’s recall lookup or use Cadillac’s recall page. Recall status is VIN- and campaign-dependent.
- If a recall appears, follow the notice’s instructions and contact an authorized Cadillac dealer about the repair. NHTSA says unrepaired recalls appear in its VIN search and recalls do not expire.
- If the vehicle displays a brake-system warning or develops a hard pedal or reduced brake assist, contact an authorized service provider promptly. Do not assume that a generic diagnostic tool, aftermarket part, or software update is an established remedy for the condition described in PE24011.
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