Brake System Malfunctions

Complaints include intermittent loss of braking assist and a hard brake pedal. A blown vacuum brake assist fuse has been noted, pointing to potential issues within the vacuum assist system or its electrical controls. Estimated repair cost: $300 - $1,000+.

Seat Belt Malfunction

A critical failure involving seat belt separation has been reported. While isolated, this points to a potential structural or assembly defect in the restraint system. Estimated repair cost: $200 - $500.

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2011 Cadillac STS Maintenance guide

Name: Maintenance dataset for 2011 Cadillac STS
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed

MAINTENANCE SUMMARY

The 2011 Cadillac STS requires diligent maintenance, with a focus on its electrical system and service brakes, which are the most frequent complaint areas. Owners should prioritize inspections of the brake vacuum assist system and electrical grounding points to mitigate potential failures.

View Critical Issue: Electrical System Failures

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Reliability Score

Est. Annual Maintenance Cost

$800 - $1,500

TSBs & Recalls

811 TSBs | 0 Recalls

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Key Takeaways

Prioritize inspection and maintenance of the electrical system and service brakes due to frequent complaints.
The vehicle has a high number of Technical Service Bulletins (TSBs), indicating numerous known issues.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance