Complaints detail severe transmission issues including jerking, hard shifting, and complete failure to engage gears, sometimes occurring at very low mileage. This points to potential systemic issues with the 9-speed automatic transmission. Estimated repair cost: $3,000 - $6,000.

Electrical System Malfunctions

Owners report a range of electrical problems, from intermittent infotainment and connectivity issues to spontaneous hazard light activation and horn honking. Tire pressure monitoring system inaccuracies are also noted. Estimated repair cost: $200 - $1,500.

Sunroof Glass Failure

Reports indicate instances of the driver's side sunroof glass exploding. This is a significant structural and safety concern that requires immediate attention. Estimated repair cost: $800 - $1,500.

Exhaust Bracket Failure

Some Enclaves have experienced exhaust bracket breaks, leading to rattling noises and potential exhaust system sag. This issue is typically reported at higher mileages. Estimated repair cost: $200 - $500.

CARFOCALvehicle research

2020 Buick Enclave Maintenance guide

Name: Maintenance dataset for 2020 Buick Enclave
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed9 Critical Recalls

MAINTENANCE SUMMARY

The 2020 Buick Enclave requires diligent maintenance, with particular attention to its powertrain and electrical systems, which are frequent complaint areas. Owners should prioritize inspections for transmission issues and electrical gremlins, as these can manifest at low mileage.

View Critical Issue: Transmission Failure

Subscribe to Recall Alerts Subscribe to Recall Alerts

Reliability Score

Est. Annual Maintenance Cost

$500 - $1,000

TSBs & Recalls

107 TSBs | 14 Recalls

CarFocal account required

Unlock the Full 2020 Buick Enclave Maintenance Guide

Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

Key Takeaways

The 2020 Buick Enclave has a 'Below Average' reliability verdict, with significant complaints focused on the powertrain and electrical systems.
Transmission issues, including hard shifting and failure, are a primary concern and can occur at low mileage.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance