GM Update 653.20 • Improvements to vehicle diagnostics
Cadillac technical service bulletin 653.20 for 2023 Cadillac Lyriq.
- Bulletin number
- 653.20 (653.20)
- Component
- Unknown or other
- Summary
- GM Update 653.20 • Improvements to vehicle diagnostics. • Fixes to preserve battery life and improve charging. • Fixes to address issues with shifting. • Fixes for vehicle airflow in icy conditions. • Improvements to HVAC compressor performance. 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.
Vehicles covered
- Cadillac Lyriq 2023 2023
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