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September 19, 2025 Over-the-air update

•Improvements to the performance of One-Pedal Driving •Improvements to propulsion and acceleration

Cadillac technical service bulletin 653.40 for 2023 Cadillac Lyriq.

Bulletin number
653.40 (653.40)
Component
Unknown or other
Summary
•Improvements to the performance of One-Pedal Driving •Improvements to propulsion and acceleration. •Fixes for vehicle diagnostics. •Improvements to the accuracy of propulsion messaging. •Improvements to vehicle safety features. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

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