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2019 Cadillac CT6 Maintenance guide

v1.0Updated May 30, 2026·Ryan Davis4 Sources Analyzed2 Critical Recalls
MAINTENANCE SUMMARY

The 2019 Cadillac CT6, with a 'Below Average' reliability verdict, demands vigilant maintenance, particularly concerning its powertrain. Owners should prioritize addressing transmission issues, which are the most frequent complaint, and be aware of potential brake system anomalies.

View Critical Issue: Powertrain Malfunction
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Reliability Score

7.0/ 10

Est. Annual Maintenance Cost

$600 - $1,000

TSBs & Recalls

226 TSBs | 6 Recalls

SummaryMaintenance & CostsCommon FailuresSymptoms & PreventionKeep ReadingFAQSources

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Key Takeaways

  • The 2019 Cadillac CT6 has a 'Below Average' reliability verdict.
  • Powertrain issues, particularly with the automatic transmission, are the most common complaints.

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Critical service intervals
Common failure analysis
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MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

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Shop Parts

Quick links for routine service and common repair parts.

  • 5W-30 Synthetic Oil
  • Oil Filter
  • Synthetic Motor Oil
  • Cabin Air Filter
  • Engine Air Filter

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