Electrical System Instability

Complaints frequently mention issues with the electrical system, including instrument cluster blackouts, power loss, and intermittent functionality of various electronic components. This is a significant concern given its high complaint volume. Estimated repair cost: $300 - $1,500+.

Some owners report issues with the service brakes, including independent engagement and potential for reduced effectiveness. While not the highest complaint volume, brake system integrity is critical. Estimated repair cost: $400 - $800.

Engine Issues (General)

Beyond fuel pump issues, general engine complaints include power train shudder and hard shifts, sometimes reported at very low mileages, suggesting potential powertrain control or internal component concerns. Estimated repair cost: $500 - $3,000+.

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2021 GMC Acadia Maintenance guide

Name: Maintenance dataset for 2021 GMC Acadia
Creator: Carfocal

v1.0Updated May 30, 2026Ryan Davis4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2021 GMC Acadia, with a 'Below Average' reliability verdict, requires diligent maintenance, particularly focusing on its electrical and fuel systems. Owners should monitor for symptoms of power loss and instrument cluster issues, as these are frequent complaint areas.

View Critical Issue: Fuel Pump Module Failure

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

81 TSBs | 2 Recalls

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Key Takeaways

Focus on electrical system and fuel pump module health due to frequent complaints.
Adhere strictly to 7,500-mile oil change intervals with synthetic oil.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance