Transmission Control Module Software Glitches

Incorrect software in the transmission control module (TCM) can lead to harsh shifting, reduced power, unintended deceleration, and potential rear wheel lockup. This is a safety-related recall item. Estimated repair cost: $150 - $300.

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2023 GMC Savana Maintenance guide

Name: Maintenance dataset for 2023 GMC Savana
Creator: Carfocal

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2023 GMC Savana, with an 'Average' reliability verdict, requires diligent maintenance. Key concerns include potential transmission control module software errors and rear HVAC blower motor circuit issues, necessitating prompt attention to recalls and TSBs.

View Critical Issue: Rear HVAC Blower Motor Circuit Corrosion

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Reliability Score

Est. Annual Maintenance Cost

$200 - $350

TSBs & Recalls

84 TSBs | 2 Recalls

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Key Takeaways

The 2023 GMC Savana has an 'Average' reliability verdict.
Two safety recalls require owner attention: transmission software and HVAC wiring.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance