Migliaccio & Rathod LLP is investigating the 2026 GMC Sierra following reports that this vehicle contains engine defects, including crankshaft thrust bearing failures, coolant control valve malfunctions, excessive engine noise and vibration, and sudden loss of power.
Reported Issues:
Consumers report:
- That their vehicle produces buzzing, rattling, or knocking noises
- That their vehicle vibrates excessively
- That their vehicle suddenly loses power while driving
- That their vehicle’s crankshaft thrust bearing failed, even at low mileage
- That their vehicle experiences coolant leaks, diagnostic trouble codes, reduced performance, or repeated repairs related to the coolant control valve
- Incurring out-of-pocket costs for diagnostic testing, repairs, rental vehicles, or engine or vehicle replacements
Why Individuals Should Be Concerned:
Potential claims include:
- Economic loss
- Safety concerns
- Performance vs. marketing
- Product defect
- Overpayment
Signs You May Be Affected:
- You own or lease a 2026 GMC Sierra
- Your vehicle emits abnormal sounds such as buzzing, rattling, or knocking
- Your vehicle vibrates excessively during operation
- Your vehicle suddenly loses power or otherwise stops working
- Your vehicle displays diagnostic trouble codes or other signs of engine malfunction or failure
- Your vehicle experiences coolant leaks or coolant control valve problems
- Your vehicle requires repeated repairs or an engine replacement
- You incurred out-of-pocket expenses in relation to these concerns
- You would not have purchased a 2026 GMC Sierra, or would have paid less, had you known about the alleged engine defects
If you have encountered these issues, we would like to hear from you. Please complete the contact form on this page, send us an email at [email protected], or give us a call at (202) 470-3520